AP3029 Datasheet, PDF (5/16 Pages) BCD Semiconductor Manufacturing Limited – WHITE LED STEP-UP CONVERTER

Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
Electrical Characteristics
(V_IN=3V, V_CTRL =3V, T_A=25^oC, unless otherwise specified.)
AP3029
Parameter
Minimum Operating Voltage
Symbol
V_IN(min)
Conditions
Maximum Operating Voltage V_IN(max)
Feedback Voltage
FB Pin Bias Current
Supply Current
Shutdown Quiescent Current
Switching Frequency
Maximum Duty Cycle
Switch Current Limit (Note 2)
Switch V_CE Saturation Voltage
Switch Leakage Current
CTRL Pin Voltage
V_FB
I_FB
I_CC
I_Q
f
D_MAX
I_LIMIT
V_CESAT
V_CTRL
I_OUT=20mA, 4 LEDs,
T_A=-40^oC to 85^oC
V_FB=V_IN, No Switching
V_CTRL=0V
T_A=25^oC, D=40%
T_A=25^oC, D=80%
I_SW=250mA
V_SW=5V
High
Low
CTRL Pin Bias Current
Schottky Forward Drop
Schottky Leakage Current
Soft Start Time
I_CTRL
V_DROP
t
T_A=85^oC
T_A=-40^oC
I_D=150mA
Reverse Voltage V_R=23V
Reverse Voltage V_R=27V
Min Typ Max Unit
2.5
V
16
188
200
212
mV
35
100
nA
1.5
2.5
3.2
mA
2.0
3.2
5.0
µA
0.9
1.2
1.5 MHz
90
93
%
550
mA
550
360
mV
0.01
5
µA
1.8
V
0.05
40
55
72
50
µA
75
0.7
V
0.1
4
µA
150
300
µS
Note 2: The Switch Current Limit is related to Duty Cycle. Please refer to Figure 16 for detail.
Aug. 2008 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
5