Diodes AP3031 - Manual (Page 5)

Data Sheet
5
Dec. 2012 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
WHITE LED STEP-UP CONVERTER AP3031
Parameter Symbol Conditions Min Typ Max Unit
Operating Voltage V
IN
2.7 16 V
Feedback Voltage (Note 2) V
FB
I
OUT
=20mA, 3 LEDs,
T
A
=-40 o C to 85 o C
188 200 212 mV
FB Pin Bias Current I
FB
35 100 nA
Quiescent Current I
Q
V
FB
=V
IN
, no switching 3.0 4.0 5.0 mA
Shutdown Quiescent Current I
SHDN
V
CTRL
=0V 20 50 80 μA
Switching Frequency f 0.75 1 1.3 MHz
Maximum Duty Cycle D
MAX
90 93 %
Switch Current Limit (Note 3) I
LIMIT
D=60% 1.2 1.4 A
Switch V
CE
Saturation Voltage V
CESAT
I
SW
=0.6A 300 mV
Switch Leakage Current V
SW
=16V 0.01 5 μA
CTRL Pin Voltage V
CTRL
Active high 1.8
V
Active low 0.5
CTRL Pin Bias Current I
CTRL
35 60 85 μA
OVP Voltage V
OVP
15.5 17.5 19.5 V
Soft-start Time t
SS
250 μs
Standby Time t
STB
0.7 ms
Thermal Shutdown T
OTSD
155 o C
Thermal Resistance
(Junction to Case) θ
JC
60
o C/W
(V
IN
=5.0V, V
CTRL
=5.0V , T
A
=25 o C, unless otherwise specified.)
Electrical Characteristics
Note 2: The bold type specifications of full temperature range are guaranteed by design (GBD).
Note 3: The switch current limit is related to duty cycle. Please refer to Figure 15 for detail.