TFS757 Datasheet, PDF (6/36 Pages) Power Integrations, Inc. – Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs

TFS757-764HG
HIGH-SIDE
OPERATING VOLTAGE (VDDH)
HSD1
HSD2
12 V
VDDH
UNDERVOLTAGE
+
11.1 V
9.9 V
HIGH-SIDE
DRAIN (HD)
DISCRIMINATOR
S
Q
R
BYPASS (BP)
PWM INPUT
FEEDBACK (FB)
and MAIN CURRENT
LIMIT SELECT
RESET (R)
LINE-SENSE (L)
MAIN REMOTE-ON FAULT PRESENT
3 V+VT
VBG
REMOTE OFF
VI_LIMIT
SOFT-START
DSS
REMOTE
OFF
LINE
SENSE
LV
POWER ON
I_LIMIT
SELECT
R
D_MAX
DUTY GATE
CYCLE
LIMIT ^CLK
L
ON
STOP
-
+
PWM
COMPARATOR
LV
D_2MAX CLK2 SAW
PWM
INPUT
Figure 3. Functional Block Diagram for Two-Switch Forward Converter.
6
Rev. C 02/11
HIGH-SIDE
SOURCE (HS)
PI-5516-060410
HSD1 HSD2
GATE
HS
DRAIN (D)
S
Q
R
CURRENT LIMIT
COMPARATOR
CONTROLLED
TURN-ON
GATE DRIVER
LEADING
EDGE
BLANKING
PI-5263-021511
THERMAL SD
SOURCE (S)
www.powerint.com