鈥?/div>
Wide Operating Frequency Range Up to 150Khz
Lowest Cost SMPS Solution
Lowest External Components
Low Start up Current (max:170uA)
Low Operating Current (max:15mA)
Internal High Voltage SenseFET
Built-in Auto Restart Circuit
Over Voltage Protection (Auto Restart Mode)
Over Load Protection (Auto Restart Mode)
Over Current Protection With Latch Mode
Internal Thermal Protection With Latch Mode
Pulse By Pulse Over Current Limiting
Internal Burst Mode Controller for Stand-by Mode
Under Voltage Lockout With Hysteresis
External Sync. Terminal
TO-3P-5L
1
TO-220F-5L
1
1. Drain 2. Gnd 3. V
CC
4. FeedBack 5. Sync.
Internal Block Diagram
3
Vpp=5.8/7.2V
1
-
OSC
SYNC
Burst Mode Coltroller
VFB
VREF
Internal
Bias
Vref
5
+
-
+
UVLO
-
+
-
+
S
R
Roff
-
PWM
_
QB
Vth=1V
Ron
VCC
Vth=11/12V
4
2.5R
Ifb
-
R
+
Vfb Offset
Idelay
VREF
VCC
Rsense
+
-
Vth=7.5V
VCC
OLP
S
Uvlo Reset
(VCC=9V)
OCL
Filter
(130nsec)
+
-
Vth=1V
2
+
-
OVP
Q
Q
S
R
Power-on Reset
(VCC=6.5V)
TSD
(Tj=160鈩?
R
Vth=30V
Rev.1.0.4
漏2001 Fairchild Semiconductor Corporation