4. +5 V. +15 V. +12 V. Battery. Backup. +2.5 V. +3.3 V. 48 V DC B us. +12 V.
Distributed Power Architecture in Telecom / Networking Equipment. +1.8 V. +1.0
V ...
DC-DC Telecom & Networking Solutions
Applications / End Products • • • • • • • • • • • • • • • • •
Fan Out Buffer Clock Switching Data Loopback HCSL FBDIMM SDH/Sonet High Speed Precision Edge General Purpose Clock Generation Infiniband 10G Ethernet 1G Ethernet PCIe iSCSI Fiber Distributed Data Interface Fiber Channel Reduction of System Clock Noise General Purpose Data & Clock Interface Precision Clock Synchronization
www.onsemi.com 2
• • • • • • • • •
Work Stations Routers Switches Network Telecom Line Card Base Station Servers Datacom
ON Semiconductor Offers a Total Solution
Clock Distribution Clock Generation ECL Logic Op Amp Comparators Signal & Interface Surge Protection ESD Protection Voltage Translators
www.onsemi.com 3
Distributed Power Architecture in Telecom / Networking Equipment +15 V +12 V
48 V DC Bus
Battery Backup
+5 V +12 V
+3.3 V +2.5 V +1.8 V +1.0 V
www.onsemi.com 4
Power Architecture in Datacom Products
+5 V +3.3 V +2.5 V +1.1 V
Adapter (+12 V / +18 V / +24 V)
www.onsemi.com 5
Distributed Power Solution AC convert to -48 V
-48 V Hot Swap
Isolate Power Conversion
POL Solutions
N+1 Redundant
AC In
AC-DC Converters
Hot Swap
AC-DC Converters
Hot Swap
-48 V Batteries
+
0 V (GND)
www.onsemi.com
DC-DC NCP1562 Active Clamp
ORing Diode MosFET
DC-DC ORing Diode CS51021 MosFET Forward/Flyback DC-DC NCP1030/1 Secondary Bias
-
6
Non-Isolate Power Conversion
Vbias / 12 V@6 W
DC-DC NCP54XX
3.3 V @ 50 A
DC-DC NCP3020
1.2 V @ 12 A
DC-DC NCP1034
5.0 V @ 15 A
DC-DC NCP3101/2
1.5 V @ 6 A 1.2 V @ 10 A 5.0 V @ 3 A
DC-DC NCP312x
3.3 V @ 3 A
MOSFETs Diodes LDO Rectifiers
Networking Power – Reference Design •
Solution : – –
•
Target Application : – – –
•
NCP1034 NTD3055, NTD24N06
Networking power Datacom +24 V / +48 V Power
Specification : – – – – – – – –
Input : +48 V (+/-10%) Output-1 : 5.0 V @ 8 A Output-2 : 12 V @ 5 A Protection: Current Limit, UVLO @ 24 V, Pre-Bias Load Efficiency: Target >85% Isolated: NO Must use ceramic capacitors Synchronize outputs for reduced EMI
www.onsemi.com 7
Component / Topology Justification •
Need synchronization capability to reduce EMI/EMC
•
Need to meet good efficiency with optimized external MOSFETs and scale output current per the requirement
•
Non-isolated offers ability to use lower cost standard buck
•
NCP1034 offers: – – – – –
Up to 100 V input & 2 A synchronous gate drive Synchronization input Output voltage down to 1.25 V Externally adjustable UVLO ENABLE with low power mode
www.onsemi.com 8
NCP1034 – 100 V Synchronous Controller Value Proposition The NCP1034 is a flexible synchronous PWM controller designed to operate from wide input supply voltage range up to 100 V. The NCP1034 provides a 2 A gate drive and is capable of producing output voltages as low as 1.25 V.
Unique Features • Up •2
Benefits
to 100 V input
•
A Drive Capability
•
• Synchronization
•
Typical Application diagram & Package info
Suitable for +48 V, +60 V, +100 V supplies Drive High Efficiency FETs Fixed frequency for 1 or more devices
Others Features • • • •
External frequency adjustment Programmable Soft-Start Programmable Over Current Protection Hiccup Current Limit Using MOSFET RDS(on)
Wide Input Voltage Range
Market & Applications Electronics: xDSL, Modems, • Automotive: CLA, Infotainment, Navigation • Computing: Telecom • Industrial: Power supplies, Process control • Consumer
Synchronous Output
Ordering info & Support SOIC-16 • NCP1034DR2G: -40 to +125°C Tj •
www.onsemi.com 9
Adjustable UVLO
Circuit and Block Diagram Type III Comp (ceramic caps)
External Current Limit Adjustment www.onsemi.com 10
Synchronization Without Synchronization
FFT Analysis
With Synchronization
NCP1034 is synchronized to the rising edge of the input signal www.onsemi.com 11
Without Synchronization
With Synchronization
Start-up into Pre-biased Load Dark blue – Output voltage Light blue – SS voltage
Green – Output current Purple – Bridge voltage
Start to Nominal Load
Start to Pre-biased Output
The NCP1034 is able to startup into a pre-biased output capacitor. The low−side MOSFET does not turn on before the high−side MOSFET gets the first turn−on pulse. During this time, the energy is not discharged by the low−side MOSFET until the soft−start sequence crosses the programmed output voltage. www.onsemi.com 12
Efficiency 90 85
Efficiency [%]
80 75 70 65
Vout = +5 V 60 55 50 0
0,5
1
1,5
2
2,5 IOUT [A]
www.onsemi.com 13
3
3,5 Vin = 38 V
4 Vin = 48 V
4,5
5 Vin = 58 V
Reference Design Dual Output 5 A/8 A Device
Application
Input Voltage
NCP1034 Network Switch
NCP1034
38 V – 58 V
Output Voltage
Output Current
Topology
12 V
5A
Buck
5V
8A
Buck
NCP1034 Characteristic
Min
NCP1034 Typ
Max
Unit
Characteristic
Output Current
8
A
5
A
200
kHz
Oscillator Frequency
mV
Output Voltage Ripple
20.5
Load Regulation
200 16.5
20.6
mV
Load Regulation
Iout = 0.1 – 5 A Vin = 48 V
0.34
mV/A
Line Regulation
Iout = 0.1 – 5 A Vin = 48 V
.035
mV/A
Line Regulation Iout = 0.1 A
0.004
%
Iout = 0.1 A
.004
%
Iout = 5 A
0.011
%
Iout = 5 A
.012
%
www.onsemi.com 14
Unit V
Output Current
16.5
Max
12
5
Output Voltage Ripple
Typ
Output Voltage
Output Voltage
Oscillator Frequency
Min
Networking Power – Reference Design •
Solution : –
•
Target Application : – – –
•
CS51021
PoE Datacom +48 V Power
Specification : – – – – – –
Input : +48 V (+/-20%) Output : 5 V @ 5 A Protection: Current Limit, Undervoltage, Overvoltage Efficiency: Target >85% Isolated: YES Must use ceramic capacitors
www.onsemi.com 15
Component / Topology Justification • Forward Converter – High efficiency, small output filter, low output ripple, – High density board design – Isolation between input and output
• CS51021 offers: – – – –
1 MHz Frequency Capability Over Voltage Protection with Programmable Hysteresis Programmable Pulse-by-Pulse Over Current Protection Current mode control with leading edge blanking
www.onsemi.com 16
Max Duty Cycle Control
Circuit and Block Diagram
Adjustable Current Limit (1st and 2nd threshold)
Current Mode Operation w/ adj slope compensation
www.onsemi.com 17
CS51021 - Current Mode PWM Controller Value Proposition The CS51021A Fixed Frequency PWM Current Mode Controller family provides all the necessary features required for AC−DC or DC−DC primary side control. Several features are integrated eliminating the additional components needed to implement them externally.
Unique Features
Benefits
1 A sink/source gate drive
High efficiency operation
Up to 1 MHz Fsw
Optimize for size or efficiency
Programmable slope compensation
Increased stability
Application Data
Others Features
Programmable Max Duty Cycle Limit Programmable Pulse−By−Pulse Overcurrent Protection Overvoltage Protection with Programmable Hysteresis Bidirectional Synchronization
Market & Applications
Consumer Electronics: PoE PD, … Automotive: Body electronics, Navigation, … Computing: Power supply, … Industrial: Power supplies, Process control, PoE PD, Solar Power Charger…
Capable of being configured as Forward, Flyback or Boost
Ordering & Package Information
www.onsemi.com 18
SOIC-16 & TSSOP-16 CS51021: -40 to +125°C Tj
Measurement Data Efficiency 90.00%
85.00%
80.00%
75.00%
Transient Response
70.00%
65.00%
60.00%
55.00%
50.00%
Load Regulation
www.onsemi.com 19
0.00
0.50
1.00
1.50
2.00
2.50
+48V Input
3.00
3.50
+72V Input
4.00
4.50
5.00
5.50
6.00
Reference Design – Isolated 5 A Output Device
Application
Input Voltage
Output Voltage
Output Current
Topology
CS51021
Network Switch
36 V – 72 V
5V
8A
Forward
CS51021 Characteristic
Min
Output Voltage
4.75
5.05
V
Output Current
0
5
A
Oscillator Frequency
Max
330
Output Voltage Ripple Load Regulation
Typ
4.99
Unit
kHz 50
mV
4.59
V
50 x 53mm
www.onsemi.com 20
Basestation Power – Reference Design •
Solution : –
•
Target Application : – –
•
NCP3102
Basestation, Telecom +18 V Power
Specification : – – – – – – – –
Input : +12 V (+/-20%) Output : 1.0 V @ 10 A Protection: Current Limit Efficiency: Target >75% @ 18 Vin to 1.0 Vout Isolated: No Must use ceramic capacitors Must be able to regulate up to 18 V input Small size / High power density
www.onsemi.com 21
Component / Topology Justification •
Application needs: – Wide input voltage range buck regulator capable of low duty cycle and high efficiency conversion to >1.25 V – Small size / High power density – Maintain output voltage accuracy in high temp environment – Lower cost compared to discrete dc-dc module
•
NCP310x offers: – – – – –
Integrated buck regulator with highly efficient FET (~8 mohm) Precision internal reference across wide temp range Thermally enhanced QFN package Output voltage down to 0.8 V Easy system integration simplifying embedded system design
www.onsemi.com 22
NCP3102 – 10 A Synchronous Converter Value Proposition The NCP3102 is an integrated wide input voltage high-output current synchronous PWM buck converter. The 10 A output in a small QFN package makes the part ideal for high power density designs.
Unique Features
Benefits
• Highly integrated 10 A solution
Application Data
• High Power Density ; Reduced
Board Space • Integrated FET (10 mΩ
HS & LS) • Highly Efficient System (>92%
max efficiency)
Others Features • 275 kHz Switching frequency • Programmable current limit • 0.8 V
+/-1% accurate internal reference
Market & Applications • • •
Consumer Electronics: CRT, LCD TVs, STB, DVD, … Computing: Power supply Industrial: Power supplies, Base Station, Broadband & Optical Communication Infrastructure
Integrated 8 mΩ mΩ HS and LS FET
Ordering & Package Information • QFN-40 • NCP3102: 0 to +85°C • NCP3102B: -40 to +85°C
www.onsemi.com 23
Minimal Support Components & Ceramic Output Capacitors
Circuit and Block Diagram Snubber circuit to limit the max voltage spikes
Regulation circuit to provide startup bias
8 mΩ HS-FET & 8 mΩ LS-FET provide high efficiency
www.onsemi.com 24
External Bias Circuit • A simple external circuit was used to extend the input voltage capability of the NCP3102 from 13.2 V to 19 V. The internal PWM control section of the NCP3102 uses a different power rail than the power FET's. Therefore, the snubber and regulation circuitry shown in Figure 4 can power the low voltage control section separately.
www.onsemi.com 25
Snubber Circuitry
• The circuit shown in Figure 4 and 5 serves as a regulator, startup delay, and snubber / EMI suppressor. www.onsemi.com 26
Efficiency
www.onsemi.com 27
Reference Design – 10 A Regulator Device
Application
Input Voltage
Output Voltage
Output Current
Topology
NCP3102
Base Station
9.6-14.4 V (18 V)
1.0 V
10 A
Buck
NCP3102 Characteristic
Min
Typ
Max
Unit
Output Voltage
1.0
Output Current
10
A
Oscillator Frequency
275
kHz
Output Voltage Ripple
10
mV
0.27
mV/A
Load Regulation Iout = 0.5 – 10 A Vin = 18 V
55 x 50mm Physical Size
www.onsemi.com 28
•
Telecom Point-of-Load Power – Reference Design
Solution : –
•
Target Application : – –
•
NCP3121
Telecom, Datacom WLAN, Cable Modem, xDSL
Specification : – – – – – – – –
Input : +12 V (+/-10%) Output-1 : 5.0 V @ 3 A Output-2 : 3.3 V @ 3 A Protection: Current Limit Efficiency: Target >80% Isolated: No Must use ceramic capacitors Small size / High power density
www.onsemi.com 29
Component / Topology Justification • Application needs: – Sequencing capability for power-up and power-down to meet new chipset requirements (FPGA, ASIC, etc.) – Small size / High power density – High volume / Low cost solution
• NCP3121 offers: – – – –
Integrated dual 3 A buck regulator Precision internal reference across wide temp range Thermally enhanced QFN package Auto-Tracking and Sequencing feature built-in
www.onsemi.com 30
Circuit and Block Diagram 180° out of phase reduces input cap
Integrated dual 3 A FET
Integrated Sequencing Capability
www.onsemi.com 31
Sequencing Requirements
Sequencing guaranteed on power-up and power-down • Prevent false data from being loaded in I/O buffers • Timing requirement must also be meet (t1, t2, t3) • Protect the ASIC from damage (reverse bias ESD structure)
www.onsemi.com 32
Auto-Tracking & Sequencing •
The NCP3120 can operate as a standalone switching converter or it can support autotracking and sequencing
•
Adjustment of the soft-start capacitors allows guaranteed power-up and power-down operation
•
Enable, Sequence and Track set the configuration
•
Several devices are also capable of being daisy chained together to manage multiple outputs Eliminates the Need for Additional External Components to Guarantee Power Management
www.onsemi.com 33
Sequencing
Sequencing: The second output voltage starts ramping when the first output voltage is already settled.
www.onsemi.com 34
Eliminates External Sequence Chip LM3880 - Power Sequencer
LT2928 – Power Supply Sequencer
ADM1086 – Voltage Sequencer
• Built-in auto-tracking and sequencing capability eliminates the need to use an external chip to manage this function and guarantee performance www.onsemi.com 35
Reference Design Dual Output 3 A / 3 A Device
Application
NCP3121
Input Voltage 10.8 – 13.2 V
xDSL
Output Voltage
Output Current
Topology
5V
3A
Buck
3.3 V
3A
Buck
NCP3121 (output-1) Characteristic
Min
Output Voltage
2.274
Output Current
0
Oscillator Frequency
Typ 3.28
NCP3121 (output-2) Max
5
69
Min 4.982
V
Output Voltage
3
A
Output Current
98
Typ 5.00
Max 5.019
3
Unit V A
300
kHz
Oscillator Frequency
mV
Output Voltage Ripple
Load Regulation
5
73
156
mV
Load Regulation
Iout = 0.1 – 3A Vin = 12V
2.97
mV/A
Line Regulation
Iout = 0.1 – 3 A Vin = 12V
4.63
mV/A
Line Regulation Iout = 0.1A
.35
.47
.64
%
Iout = 0.1A
-.01
.00
.11
%
Iout = 3A
.64
.70
.76
%
Iout = 3A
-.36
-.28
-.20
%
www.onsemi.com 36
Characteristic
3.298
300
Output Voltage Ripple
Unit
Telecom Bias Supply – Reference Design •
Solution : –
•
Target Application : –
•
NCP1031
Basestation, Networking
Specification : – – – – – – – –
Input : +35 V to +76 V (+48 V) Output-1 : 12 V Power: 2 W Protection: Current Limit, UV/OV Efficiency: Target >80% Isolated: Yes Must use ceramic capacitors Small size / High power density
www.onsemi.com 37
Component / Topology Justification • Application needs: – Small size / High power density. Minimal number of support components. – Wide input voltage range to cover +48 V Telecom
• NCP1030 offers: – – – –
Integrated power switch Internal start-up regulator ; direct power from input voltage Improved efficiency with SENSEFET™ Reduced EMI with integrated gate drive and power switch
www.onsemi.com 38
NCP1030/31 – PWM Controller & Power Switch Value Proposition The NCP1030 and NCP1031 are a family of miniature high-voltage monolithic switching regulators with on-chip Power Switch and Startup Circuits. The NCP103x can be configured in any single-ended topology such as forward or flyback.
Unique Features
Benefits
•
200 V Switch
•
•
Up to 1 MHz Fsw
•
•
Synchronization
•
Typical Application diagram & Package info
Suitable for +48 V, +60 V, +100 V supplies Reduced size Fixed frequency for 1 or more devices
Others Features • • • •
Internal Start-up Circuit with aux winding override External frequency synchronization Trimmed +/-2% internal reference Active Leading Edge Blanking (LEB) Circuit
Market & Applications • • •
Consumer Electronics: xDSL, Modems Computing: Telecom Industrial: Power supplies, Process control, Low Power Bias supply, 2nd Side Bias w/ isolated dc-dc
Minimal Number of External Components Ordering info & Support NCP1030: Micro-8 • NCP1031: SOIC-8 & DFN-8 •
www.onsemi.com 39
Schematic Integrated 200 V Power Switch w/ SenseFET
Integrated startup regulator
Dynamic Self-Supply (DSS) from the Vcc capacitor External adjustment of over voltage and under voltage trip point
www.onsemi.com 40
Integrate Key Function • NCP1030: Integrates - Supervisory - PWM Controller - Power Switch
• Discrete Implementation:
www.onsemi.com 41
Reduced PCB Space / Higher Density • A bias supply implemented using the NCP1030 compared to a TL384x and MAX6457 solution results in a footprint area saving of 91%!!!!
www.onsemi.com 42
Performance Data
www.onsemi.com 43
Efficiency
Line & Load Regulation
