Diodes AP3156 - Manual (Page 5)

AP3156
HIGH EFFICIENCY 1X/1.5X/2X CHARGE PUMP
FOR WHITE LED APPLICATIONS
AP3156 Rev. 1 5 of 15 SEPTEMBER 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics
C
IN
= C
OUT
= C
1
= C
2
= 1.0µF; T
A
= 25°C, V
IN
= 3.5V. Unless otherwise noted.
Symbol Parameter Test Conditions Min Typ. Max Unit
I
Q
Quiescent Current
1X Mode, 3.0 ≤ V
IN
≤ 5.5, Active,
No Load Current
0.3 1
mA
1.5X Mode, 3.0 ≤ V
IN
≤ 5.5, Active,
No Load Current
2.0 3
2X Mode, 3.0 ≤ V
IN
≤ 5.5, Active,
No Load Current
1.5 3
50µA Setting, 1X Mode 50 µA
I
SHDN
Shutdown Current SDI = 0 1 µA
I
DX
I
SINK
Current Accuracy
(Note 4)
I
SET
= 20mA (Note 5), T
A
= 25
°C
18.6 20 21.4 mA
I
SET
= 4mA (Note 5), T
A
= 25
°C 3.6 4 4.4 mA
I
D-Match
Current Matching Between Any
Two Current Sink Inputs
(Note 6)
V
F
:
D1:D6 = 3.6V
0.5 %
V
TH
1X to 1.5X or 1.5X to 2X
Transition Threshold at Any
I
SINK
Pin
I
SET
= 25mA 150 mV
Charge Pump Section
T
SS
Soft-Start Time 40 µs
F
CLK
Clock Frequency
0.5/
1/
2
MHz
SDI
V
SDI(L)
SDI Threshold Low V
IN
= 2.7V 0.4 V
V
SDI(H)
SDI Threshold High V
IN
= 5.5V 1.4 V
T
SLO
SDI Low Time 0.3 50 µs
T
SHI
SDI High Time 0.05 50 µs
T
OFF
SDI Off Timeout 256 µs
T
SEP
SDI Valid Sequence Timeout 256 µs
I
SDI
SDI Input Leakage -1 1 µA
θ
JA
Thermal Resistance
Junction-to-Ambient
QFN4040-16 (Note 7) 46
o
C/W
Notes: 4. Determined by the average current levels of all active channels
5. Sequence setting set to give nominal 20mA max output current and 4mA output current.
6. Defined as the deviation of any sink current from the average of all active current channels
7. Device mounted on FR-4 substrate, 2"*2", 2oz, copper, double-sided PC board,