PFS757HG POWERINT [Power Integrations, Inc.], PFS757HG Datasheet - Page 4

• Manufacturer Part Number: PFS757HG
• Description: Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs
• Manufacturer: POWERINT [Power Integrations, Inc.]

Table 2.
Rev. C 02/11
Nominal Duty Cycle
Maximum Duty Cycle
Switch Current (RMS)
Output Catch Diode
Clamp Voltage
Thermal Shutdown
Current Sense Resistor
High-Side Drive
Component Count
TinySwitch Overload Power
Compensation vs. Input Voltage
Package Creepage
Package Assembly
4
Summary of Differences Between HiperTFS and Other Typical High Power Supplies.
TFS757-764HG
Function
2 × TO-220 package, 2
Reset diodes from zero
transformer (high cost)
0.5 V drop (0.33 W at
Typical Two-Switch
Requires gate-drive
TO-220 = 1.17 mm
× SIL (insulation)
V
O
Forward
300 W)
+ V
Higher
<50%
100%
to V
33%
---
---
D
/D
IN
MAX
Built in high-side drive
Built-in compensation
eSIP16/12 = 2.3 mm/
118 °C Shutdown /
Reset from zero to
Sense resistor not
55 °C hysteresis
V
1 Package
(V
HiperTFS
O
required
3.3 mm
+ V
IN
Lower
45%
63%
83%
+ 130)
D
/D
MAX
Wider duty cycle reduces RMS switch currents by 17%.
Reduces R
Lower losses. Wider D
(1-(50%/63%)) = 21% reduction in catch diode voltage
rating
With fast/slow diode combination, allows charge
recovery to limit high-side C
HiperTFS provides integrated OTP device protection
Improved efficiency. MOSFET R
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
DS(ON)
Advantages of HiperTFS
losses by 31%
MAX
lowers catch diode rating by
OSS
loss
DS(ON)
www.powerint.com
sense eliminated