AP8802SPG-13 Diodes Inc, AP8802SPG-13 Datasheet - Page 6

• Manufacturer Part Number: AP8802SPG-13
• Description: IC LED DRIVER HIGH BRIGHT 8SOIC
• Manufacturer: Diodes Inc
• Type: HBLED Driverr

Specifications of AP8802SPG-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-SOP
• Operating Temperature: -40°C ~ 105°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 92%
• Led Driver Application: Commercial, Industrial Lighting
• No. Of Outputs: 1
• Output Current: 1A
• Dimming Control Type: PWM / DC
• Operating Temperature Range: -40°C To +105°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AP8802SPGDITR

Application Information
LED Current Control
The LED current is controlled by the resistor RSET in Figure 1 connected between V
average output current in the LED(s) is defined as:
If the CTRL pin is driven by an external voltage (lower than 2.5V), the average LED current is:
AP8802 Rev. 5
DS31766
I
I
LED
LED
1200
1000
=
=
800
600
400
200
0
R
V
V
V
0 0.15 0.3 0.45 0.6 0.75 0.9 1.05 1.2 1.35 1.5 1.65 1.8 1.95 2.1 2.25 2.4 2.55 2.7 2.85 3
THD
CTRL
SET
REF
R
V
0.2
0.2
THD
SET
0.33
0.33
0.39
0.39
0.47
0.47
0.47
0.56
0.56
0.68
0.68
0.68 0.82
Figure 3: LED Current setting Vs R
0.82
0.82
1
1
1
LED current Versus RSET and VCTRL
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1.2
1.2
RSET value [Ohms]
1.2
6 of 16
1.5
1.5
1.5
2
2
2
SET
and V
1A LED Step-down Converter
CTRL
IN
3
and SET. The nominal
3
3
DECEMBER 2009
©
AP8802
Diodes Incorporated
LED current @
VCTRL = 1.25V
LED current @
VCTRL = 2.5V
LED current @
VCTRL = 0.625V