
AP8800A
Recommended Operating Conditions (@T A = +25°C, unless otherwise specified.)
Symbol
V IN
V CTRLDC
V CTRLL
I SW
D PWM
f SW
T A
Parameter
Operating Input Voltage Relative to GND
Voltage Range for 24% to 200% DC Dimming Relative to GND
Voltage Low for PWM Dimming Relative to GND
Continuous Average Switch Current (Note 4)
Duty Cycle Range Applied to CTRL (f < 500Hz)
Switching Frequency
Ambient Temperature Range
Min
8.0
0.3
0.01
-40
Max
28
2.5
0.2
370
1
600
105
Unit
V
V
V
mA
kHz
°C
Note:
4. Dependent on junction and ambient temperature.
Electrical Characteristics (@T A = +25°C, V IN = 12V, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
I Q
I SD
V THD
V REF
I SET
R DS(ON)
I SW-LKG
f SW
t SS
t PD
θ JA
Quiescent Current
Shutdown Current
Internal Threshold Voltage
Internal Reference Voltage
SET Pin Input Current
On Resistance of MOSFET
Switch Leakage Current
Switching Frequency with L = 100μH
Soft-Start Time
Internal Comparator Propagation Delay
Thermal Resistance Junction-to-Ambient
V CTRL = 1.25V, f SW = 250kHz
V CTRL = 0V
V SET = V IN -0.1
ADJ pin floating L = 100H
I OUT = 350mA @ 1 LED (V LED = 3.4V)
Time taken for output current to reach 90%
of final value after V CTRL = 0.3V
TSOT25 (Note 5)
95
300
20
100
1.25
1.3
1.5
250
500
55
200
650
30
105
2.2
5
μA
μA
mV
V
μA
?
μA
kHz
μs
ns
° C/W
Note:
5. Test condition for TSOT25: Device mounted on FR-4 PCB (25mm x 25mm 1oz copper, minimum recommended pad layout on
top layer and thermal vias to bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed.
AP8800A
Document number: DS35100 Rev. 3 - 2
3 of 13
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August 2012
? Diodes Incorporated