STSR2 STMicroelectronics, STSR2 Datasheet - Page 5

• Manufacturer Part Number: STSR2
• Description: FORWARD SYNCHRONOUS RECTIFIERS SMART DRIVER
• Manufacturer: STMicroelectronics

TIMING DIAGRAM
APPLICATION INFORMATION: STSR2 IN FORWARD CONVERTER SECONDARY SIDE
NOTES
1) Ceramic Capacitors C1 and C2 must be placed very close to the IC;
2) R1 and R2 set the anticipation time by partitioning the V
3) R3 and R4 is a resistor divider meant to provide the correct CK voltage range;
4) R5 limits the current flowing through diode D2 when Freewheeling drain voltage is high;
5) D1 could be necessary to protect INHIBIT pin from negative voltages.
6) D2 could be necessary to protect INHIBIT pin from voltages higher than V
7) D3 could be necessary to protect CK pin from voltages higher than V
8) SGLGND layout trace must not include OUT
9) A capacitor in parallel with R4 could be necessary to eliminate turn off voltage spike.
PWM
Vin
TRANSFORMER
Feedback
Loop
GATE1,2
MosfetN
Q1
current paths.
STSR2
CC
option
voltage;
MosfetN
Q2
CC
.
D1
CC
INDUCTOR
100nF
Cout
SGLGND
SETANT
D2
+5V
Ck
R5
6
3
4
Vout
D3
100nF
+5V
+5V
R1
R2
R3
R4
STSR2
5/12