
TFS757-764HG
HiperTFS Family
www.powerint.com
February 2011
Combined Two-Switch Forward and Flyback Power Supply Controllers
with Integrated High Voltage MOSFETs
HD
DC
Input
Main Output
Auxiliary/Standby
Output
RTN
G
S
HiperTFS
VDDH
L
FB
EN
BP
DSB
EN
FB
Control,
Gate Drivers,
Level Shift
R
D
HS
PI-6200-102910
Two-Switch Forward
Transformer
Flyback
Transformer
Figure 1.
Simplified Schematic of Two-Switch Forward and Flyback Converter.
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
Two-Switched Forward
380 V
Flyback
100 V - 400 V
Continuous
(25 °C)
Continuous
(50 °C)
Peak
(50 °C)
50 °C
TFS757HG
193 W
163 W
228 W
20 W
TFS758HG
236 W
200 W
278 W
20 W
TFS759HG
280 W
235 W
309 W
20 W
TFS760HG
305 W
258 W
358 W
20 W
TFS761HG
326 W
276 W
383 W
20 W
TFS762HG
360 W
304 W
407 W
20 W
TFS763HG
388 W
327 W
455 W
20 W
TFS764HG
414 W
344 W
530 W
20 W
Table 1. Output Power Table (See Notes on page 13).