Diodes AP8800 - Manual (Page 2)

AP8800
Document number: DS31764 Rev. 7 - 2
2 of 13
www.diodes.com
August 2012
© Diodes Incorporated
AP8800
Pin Descriptions
Pin Name
Pin Number
Function
SO-8 MSOP-8 U-DFN3030-10
SW 3 3 4
Switch Pin. Connect inductor/freewheeling diode here. Minimize trace area at this pin to
reduce EMI.
GND 4 4 5 GND Pin
SET 8 8 10 Set Nominal Output Current Pin. To configure the output current of the device.
CTRL 1 1 1
Dual function dimming control pin.
• Input voltage of 0.2V or lower forces the device into low current standby mode and
shuts off the output.
• A PWM signal (driven by an open-drain/collector source) allows the output current
to be adjusted over a wide range up to 100%.
• An analog voltage between 0.3V and 2.5V adjusts the output current between 25%
and 200% of the current set by 0.2V/R
S
.
The input impedance is about 200k Ω, and if the pin is left open V
CTRL
= V
REF
V
IN
5 5 6 Input Supply Pin. Must be locally bypassed.
RSVD 2 2 2 Reserved. Normally connected to Ground
NC 6, 7 6, 7 2, 7, 8, 9 No Connection.
Functional Block Diagram
Absolute Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
Symbol Parameter Rating Unit
V
IN
VIN Pin Voltage -0.3 to +30 V
V
SET
Set Voltage Relative to V
IN
V
IN
-5 to V
IN
+0.3 V
VSW SW Voltage -0.3 to +30 V
V
CTRL
CTRL Pin Input Voltage -0.3 to +5 V
T
J
Maximum Junction Temperature 125 °C
T
LEAD
Maximum Lead Temperature 300 °C
T
ST
Storage Temperature Range -55 to +125 °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.