Ap3036b, Functional block diagram – Diodes AP3036B User Manual
Page 2
AP3036B
Document number: DS37004 Rev.
1 - 2
2 of 11
March 2014
© Diodes Incorporated
AP3036B
A Product Line of
Diodes Incorporated
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Pin Descriptions
Pin Number
Pin Name
Function
1
CTRL
Shutdown and dimming pin. Connect to 1.5V or higher to enable device; Connect to 0.4V or less to
disable device; Connect to a PWM signal to achieve LEDs brightness dimming
2
VOUT
Output pin. Connect to the cathode of internal Schottky diode
3
VIN
Input supply pin. Must be connected to a local bypass capacitor
4
SW
Switch pin. Connect external inductor
5
GND
Ground
6
FB
Voltage feedback pin. The reference voltage is 200mV
Functional Block Diagram
Q1
A2
A1
R
S
Q
1.0 MHz
OSCILLATOR
RAMP
GENERATOR
V
REF
6
3
1
5
2
DRIVER
1.25 V
COMPARATOR
OVP
200 mV
4
SOFT
START
FB
SW
VOUT
GND
CTRL
VIN