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AP8800A
Pin Descriptions
Pin Name
SW
GND
CTRL
SET
V IN
Pin Number
1
2
3
4
5
Function
Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.
GND Pin
Dimming and On/Off Control Input.
? Input voltage of 0.2V or lower forces the device into low current standby mode and shuts off the output.
An open-drain/collector PWM signal allows the output current to be adjusted below the level set by the
resistor connected to SET input pin.
? The input impedance is about 50k ? , and if the pin is left open V CTRL = V REF .
? Drive with DC voltage (0.3V < V CTRL < 2.5V) to adjust output current from 24% to 200% of I OUTnom
Set Nominal Output Current Pin.
Configures the output current of the device.
Input Supply Pin. Must be locally decoupled to GND with > 2.2μF X7R ceramic capacitor – see applications
section for more information.
Functional Block Diagram
Absolute Maximum Ratings (@T A = +25°C, unless otherwise specified.)
Symbol
V IN
V SET
V SW
V CTRL
I SW
T J
T LEAD
T ST
Parameter
Continuous V IN Pin Voltage Relative to GND
Set Voltage Relative to V IN
SW Voltage Relative to GND
CTRL Pin Input Voltage
Switch Current
Junction Temperature
Lead Temperature Soldering
Storage Temperature Range
Ratings
-0.3 to +30
V IN -5 to V IN +0.3
-0.3 to +30
-0.3 to +5
0.45
105
300
-55 to +150
Unit
V
V
V
V
A
°C
°C
°C
Caution:
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when
handling and transporting these devices.
AP8800A
Document number: DS35100 Rev. 3 - 2
2 of 13
www.diodes.com
August 2012
? Diodes Incorporated
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