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부품번호 | TFS758HG 기능 |
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기능 | (PFS757 - PFS764) Combined Two-Switch Forward and Flyback Power Supply Controllers | ||
제조업체 | Power Integrations | ||
로고 | |||
전체 30 페이지수
TFS757-764HG
HiperTFS™ Family
Combined Two-Switch Forward and Flyback Power Supply Controllers
with Integrated High Voltage MOSFETs
Key Benefits
• Single chip solution for two-switch forward main and flyback
standby
• High integration allows smaller form factor and higher power
density designs
• Incorporates control, gate drivers, and three power
MOSFETS
• Level shift technology eliminates need for pulse transformer
• Protection features include: UV, OV, OTP, OCP, and SCP
• Transformer reset control
• Prevents transformer saturation under all conditions
• Allows >50% duty cycle operation
• Reduces primary side RMS currents and conduction losses
• Standby supply provides built-in overload power compensation
• Up to 434 W total output power in a highly compact package
• Up to 550 W peak
• High efficiency solution easily enables design to meet
stringent efficiency specifications
• >90% efficiency at full load
• No-load regulation and low losses at light-load
• Simple clip mounting to heat sink without need for insulation pad
• Halogen free and RoHS compliant
Applications
• PC
• Printer
• LCD TV
• Video game consoles
• High-power adapters
• Industrial and appliance high-power adapters
Output Power Table
Product
TFS757HG
TFS758HG
TFS759HG
TFS760HG
TFS761HG
TFS762HG
TFS763HG
TFS764HG
Two-Switched Forward
380 V
Continuous Continuous
(25 °C)
(50 °C)
Peak
(50 °C)
193 W
163 W
228 W
236 W
200 W
278 W
280 W
235 W
309 W
305 W
258 W
358 W
326 W
276 W
383 W
360 W
304 W
407 W
388 W
327 W
455 W
414 W
344 W
530 W
Table 1. Output Power Table (See Notes on page 13).
Flyback
100 V - 400 V
50 °C
20 W
20 W
20 W
20 W
20 W
20 W
20 W
20 W
HiperTFS VDDH
L
HD
HS
D
DC
Input
Control,
Gate Drivers,
FB Level Shift
R
DSB
FB
EN
EN
BP
GS
Figure 1. Simplified Schematic of Two-Switch Forward and Flyback Converter.
www.powerint.com
Two-Switch Forward
Transformer
Flyback
Transformer
Main Output
Auxiliary/Standby
Output
RTN
EN FB
PI-6200-102910
February 2011
TFS757-764HG
Function
Nominal Duty Cycle
Maximum Duty Cycle
Switch Current (RMS)
Output Catch Diode
Typical Two-Switch
Forward
33%
<50%
100%
VO + VD/DMAX
HiperTFS
45%
63%
83%
VO + VD/DMAX
Clamp Voltage
Thermal Shutdown
Current Sense Resistor
High-Side Drive
Component Count
TinySwitch Overload Power
Compensation vs. Input Voltage
Package Creepage
Package Assembly
Reset diodes from zero
to VIN
---
0.5 V drop (0.33 W at
300 W)
Requires gate-drive
transformer (high cost)
Higher
---
Reset from zero to
(VIN + 130)
118 °C Shutdown /
55 °C hysteresis
Sense resistor not
required
Built in high-side drive
Lower
Built-in compensation
TO-220 = 1.17 mm
2 × TO-220 package, 2
× SIL (insulation)
eSIP16/12 = 2.3 mm/
3.3 mm
1 Package
Table 2. Summary of Differences Between HiperTFS and Other Typical High Power Supplies.
Advantages of HiperTFS
Wider duty cycle reduces RMS switch currents by 17%.
Reduces RDS(ON) losses by 31%
Lower losses. Wider DMAX lowers catch diode rating by
(1-(50%/63%)) = 21% reduction in catch diode voltage
rating
With fast/slow diode combination, allows charge
recovery to limit high-side COSS loss
HiperTFS provides integrated OTP device protection
Improved efficiency. MOSFET RDS(ON) sense eliminated
need for sense resistor
Lower cost; component elimination. Removes
high-cost gate-drive transformer (EE10 or toroid)
Saves up to 50 components, depending on specification.
Safer design; easier to design power supply. Flattens
overload output power over line voltages
HiperTFS meets functional safety spacing at package
pins
No SIL (insulation) pad required
4
Rev. C 02/11
www.powerint.com
4페이지 TFS757-764HG
BYPASS (BP)
LV (LINE VOLTAGE)
REGULATOR
5.7 V
STANDBY DRAIN (DSB)
115 µA
ENABLE
ENABLE (EN)
and STANDBY
CURREN LIMIT
SELECT
1.0 V + VT
1.0 V
6.0 V
AUTO-
RESTART
COUNTER
RESET
FAULT
PRESENT
JITTER
CLOCK
CLK2
DCMAX
D2MAX
SAW
OSCILLATOR
MAIN
REMOTE
ON/
OVP
LATCH OFF
ENABLE PULL
UP RESISTOR
SELECT AND
CURRENT
LIMIT STATE
MACHINE
+
-
5.7 V
4.7 V
BYPASS PIN
UNDER-VOLTAGE
ILVIMINIT
ADJUST
VILIMIT
CURRENT LIMIT
COMPARATOR
-
+
THERMAL
SHUTDOWN
SQ
RQ
LEADING
EDGE
BLANKING
SAW
MAIN
REMOTE
ON
CLK2
D2MAX
FAULT
PRESENT
Figure 4. Functional Block Diagram for Flyback/Standby Converter.
THERMAL SD
SOURCE (S)
PI-5264-020510
www.powerint.com
7
Rev. C 02/11
7페이지 | |||
구 성 | 총 30 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
TFS758HG | (PFS757 - PFS764) Combined Two-Switch Forward and Flyback Power Supply Controllers | Power Integrations |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |