AP8803
Recommended Operating Conditions (@T A = +25°C, unless otherwise specified.)
Symbol
V IN
V CTRLH
V CTRLL
I SW
T A
Duty Cycle
Parameter
Operating Input Voltage
Voltage High
Voltage Low
Continuous Switch Current (Note 5)
Ambient Temperature Range
Using Inductor ≥ 100μH (Note 4)
Min
8.0
0.3
-40
0.1
Max
30
2.5
0.25
1
+125
0.95
Unit
V
V
V
A
°C
Notes:
4. For most applications the LED current will be within 8% over the duty cycle range specified. Duty cycle accuracy is also dependent on
propagation delay. Smaller size inductors can be used but LED current accuracy may be greater than 8% at extremes of duty cycle. This is
most noticeable at low duty cycles (less than 0.1) or when the input voltage is high and only one LED is being driven.
5. Refer to Figure 8 for the device derating curve.
Electrical Characteristics (@T A = +25°C, unless otherwise specified.)
Symbol
V INSU
V INSD
Parameter
Internal Regulator Start-Up Threshold
Internal Regulator Shutdown Threshold
V IN rising
V IN falling
Conditions
Min
Typ
5.65
5.55
Max
Unit
V
V
I Q
V THD
I SET
V REF
R DS(on)
I SW
I SW_Leakage
f OSC
θ JA
Quiescent Current
Internal Threshold Voltage
SET Pin Input Current
Internal Reference Voltage
On Resistance of MOSFET
Continuous Switch Current
Switch Leakage Current
Switching Frequency
Thermal Resistance Junction-to-
Ambient
CTRL pin floating f = 250kHz
V SET = V IN -0.1
I SW = 1A
(Note 5)
TSOT25 (Note 6)
92
1.8
100
1.25
1.25
0.5
125
5
108
10
1
1
8
0.7
mA
mV
μA
V
?
A
μA
MHz
°C/W
Notes:
5. Refer to Figure 8 for the device derating curve.
6. Test condition for TSOT25: Device mounted on FR-4 PCB, 25mm x 25mm, 2oz 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.
AP8803
Document number: DS31970 Rev. 5 - 2
3 of 10
www.diodes.com
August 2012
? Diodes Incorporated
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