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Wide Operating Frequency Range Up to 150Khz
Lowest Cost SMPS Solution
Lowest External Components
Low Start-up Current (max:170uA)
Low Operating Current (max:12mA)
Internal High Voltage SenseFET
Over Voltage Protection With Latch Mode (Min23V)
Over Load Protection With Latch Mode
Over Current Protection With Latch Mode
Internal Thermal Protection With Latch Mode
Pulse By Pulse Over Current Limiting
Under Voltage Lockout With Hysteresis
External Sync. Terminal
TO-3P-5L
1
TO-220F-5L
TO-220-5L
1
1
1. Drain 2. Gnd 3. V
CC
4. FeedBack 5. Sync.
Internal Block Diagram
V
CC
3
V
CC
UVLO
+
-
15/9V
Soft Start
& Sync
5
VREF
Feedback 4
0.95mA
2.5V
R
VREF
V
CC
4碌A(chǔ)
OLP
(Vfb=7.5V)
TSD
(Tj=160擄C)
OVP
(V
CC
=25V)
1碌s Window
Open Circuit
OCP
(V
S
=1.1V)
S
Q
R
Shutdown Latch
-
Vth.sy
+
7V
6V
-
+
Voffset
R
S
Q
Bias
Vref
2.5V
OSC
CLK
+
-
VREF UVLO
Drain
1
SenseFET
V
S
Rsense
2 GND
Power-on Reset
(VCC=6.5V)
Rev.1.0.2
漏2001 Fairchild Semiconductor Corporation