ams Datasheet Page 1
[v2-23] 2016-Mar-30 Document Feedback
AS3685A/AS3685B
Ultra Small High Efficiency 1000mA
Charge Pump for White LED Flash
The AS3685 is low noise high efficiency capacitive charge pump
with 1:1, 1:1.5 and 1:2 operating modes in a small 3x3mm DFN10
or a tiny 2x1.5mm WL-CSP (Wafer Level Chip Scale Package)
package. It can drive one flash LED at up to 1000mA current. It
supports flash/torch and indicator mode for the
flash LED.
Additionally the AS3685 limits the flash time automatically to
protect the flash LED.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS3685A/AS3685B, Ultra Small
High Efficiency 1000mA Charge Pump for White LED Flash are
listed below:
Figure 1:
Added Value Of Using AS3685A/AS3685B
Benefits Features
• System safety
• High efficiency capactive charge pump with 1:1, 1:1.5
and 1:2 modes therefore maximum input current is
exactly controlled.
• Overtemperature protection
• Automatic 800ms flash timeout to protect the flash
LED
• Drive LED at high brightness for better pictures • Up to 1000mA LED Current
• Flexible selection of interface type
• Two device variants:
• AS3685A: Direct control to select three currents
• AS3685B: Single pin interface or two pin
interface with strobe input; 17 different currents
can be selected
• Flexible package options
• DFN10 (3x3mm) 10 pins + exposed pad
• WL-CSP (2x1.5mm) 3x4 balls 0.5mm pitch
