AAT2801IXN-4.5-T1 AnalogicTech, AAT2801IXN-4.5-T1 Datasheet - Page 19

• Manufacturer Part Number: AAT2801IXN-4.5-T1
• Description: Multi-Mode Charge Pump for White LED Backlight and Flash Applications
• Manufacturer: AnalogicTech

Where:
R
R
V
V
I
2801.2006.04.1.3
F
OUT
F
B
DS
=
=
=
=
=
Flash ballast resistor value in ohms (Ω)
Flash gating mosfet on resistance
Regulated charge pump output voltage
(typically 4.5V)
Flash LED forward voltage at the
desired forward current
Desired flash LED forward current
Flash Enable
Flash Enable
R
B
=
V
(V
IN
OUT
Figure 2: Flash LED Driver with Gated Flash Application.
I
F
- V
F
1μF
)
C
IN
- R
DS
EN_FLSH
IN
AAT2801
C3+
White LED Backlight and Flash Applications
OUT_FLSH
1μF
C
3
C3-
4.5V
C
1μF
OUT
Multi-Mode Charge Pump for
R
L
R
B
Flash LED
19