AP8802SG-13 Diodes Inc, AP8802SG-13 Datasheet - Page 7

• Manufacturer Part Number: AP8802SG-13
• Description: IC LED DRIVER HIGH BRIGHT 8SOIC
• Manufacturer: Diodes Inc
• Type: HBLED Driverr

Specifications of AP8802SG-13

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 500kHz
• Voltage - Supply: 8 V ~ 48 V
• Voltage - Output: 48V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Operating Temperature: -40°C ~ 105°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 92%
• High Level Output Current: 1 A
• Operating Supply Voltage: 8 V to 48 V
• Maximum Supply Current: 120 uA
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AP8802SGDITR

Application Information
Inductor Selection
This section highlights how to select the inductor suitable for the application requirements in terms of
switching frequency, LED current accuracy and temperature.
The inductor influences the LED current accuracy that the system is able to provide. The following section
highlights how to select the inductor in relation to the device packages and the LED current, while maintaining
the chip temperature below 70˚C.
AP8802 Rev. 5
DS31766
500
450
400
350
300
250
200
150
100
50
0
0
50
47
47
68
68
68
100
100
100
100
Figure 4: Switching Frequency Vs Inductor Value
150
150
150
150
Switching Frequency @ ILED = 700mA
(Continued)
200
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Inductor Value [uH]
220
220
220
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250
300
350
1A LED Step-down Converter
400
450
470
470
470
500
DECEMBER 2009
©
AP8802
Diodes Incorporated
12V - 3 LEDs
24V - 5 LEDs
48V - 10 LEDs