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TFS758HG 데이터시트 PDF




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부품번호 TFS758HG 기능
기능 (PFS757 - PFS764) Combined Two-Switch Forward and Flyback Power Supply Controllers
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TFS758HG 데이터시트, 핀배열, 회로
TFS757-764HG
HiperTFSFamily
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




TFS758HG pdf, 반도체, 판매, 대치품
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










TFS758HG 전자부품, 판매, 대치품
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

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TFS758HG

(PFS757 - PFS764) Combined Two-Switch Forward and Flyback Power Supply Controllers

Power Integrations
Power Integrations

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