AP8800AWT-7 Diodes Inc, AP8800AWT-7 Datasheet - Page 9

• Manufacturer Part Number: AP8800AWT-7
• Description: LED Drivers 28V 1-W LED Driver DC/DC Converter
• Manufacturer: Diodes Inc
• Series: -r

Specifications of AP8800AWT-7

• Constant Current: Yes
• Constant Voltage: -
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: General Purpose
• Type - Secondary: -
• Frequency: 600kHz
• Voltage - Supply: 8 V ~ 28 V
• Voltage - Output: -
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5 Thin, TSOT-23-5
• Operating Temperature: -40°C ~ 105°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Applications Information
Thermal Considerations
The graph below in figure 4, gives details for the power derating of the AP8800AWT. This assumes the device to be mounted
on a 25x25mm PCB with 1oz copper standing in still air.
Soft-start
An external capacitor from the CTRL pin to ground will provide soft-start delay, by increasing the time taken for the voltage on
this pin to rise to the turn-on threshold and by slowing down the rate of rise of the control voltage at the input of the
comparator. The soft-start time is 0.5ms/nF.
AP8800A
Document number: DS35100 Rev. 2 - 2
450
400
350
300
250
200
150
100
50
0
-40
-25
-10
(Continued)
5
Figure 4. Derating Curve
(T
Ambient temperature (°C)
A
= 25°C unless otherwise stated)
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COST EFFECTIVE 28V BUCK 1-W LED DRIVER
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AP8800A
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© Diodes Incorporated
January 2011
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