M51995AP/AFP
Recommended Operating Conditions
•
•
•
Supply voltage range: 12 to 36 V
Operating frequency: less than 500 kHz
Oscillator frequency setting resistance
T-ON pin resistance RON: 10 k to 75 kΩ
T-OFF pin resistance ROFF: 2 k to 30 kΩ
Block Diagram
VCC
F/B
DET GND
7.1 V
5.8 V
Voltage
regulator
3 k
500
15.2 k
Under
voltage
lockout
ON/OFF
1 S
6 S
−
OP AMP
+
1 S
1 S
OVP (shut down)
2.5 V
Latch
Collector
VOUT
PWM
Comparator
PWM
latch
Emitter
Oscillator capacitance
CF
Intermittent
action and
OSC control
Oscillator resistance
T-ON (ON duty)
Oscillator
(triangle)
+Current
limit latch
−Current
limit latch
Intermittent
action
Oscillator resistance
T-OFF (OFF duty)
VF
CLM+ CLM−
+Current limit −Current limit
CT
Intermittent operation
determine capacitance
REJ03D0835-0300 Rev.3.00 Jun 06, 2008
Page 2 of 40
RENESAS [ RENESAS TECHNOLOGY CORP ]
