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AS3685A Datasheet(PDF) 6 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Part No. AS3685A
Description  Ultra Small High Efficiency 1000mA Charge Pump
Download  25 Pages
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Manufacturer  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Direct Link  http://www.taosinc.com
Logo TAOS - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

AS3685A Datasheet(HTML) 6 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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AS3685A/AS3685B
Datasheet
www.austriamicrosystems.com/
AS3685
(ptr)
Revision 2.2
5 - 24
Table
4 – Current Source (Sink) Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Note
ITORCH2ISET
Torch Current to Bias Current
Ratio
1639
A/A
AS3685A, EN1=0, EN2=1
(150mA with RISET = 14.2kΩ)
400
mV
AS3685A, EN1=1, EN2=1 or
AS3685B with ILED>350mA
(with RISET = 14.2kΩ)
VSWITCH
Mode Switching Threshold on
V(ILED) between 1:1 -> 1:1.5
and 1:1.5 -> 1:2
150
200
250
mV
All lower currents
Table
5 –Digital Interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Note
VIH
High Level Input voltage
1.5
VBAT
V
VIL
Low Level Input voltage
0.0
0.5
V
ILEAKAGE
Input pin leakage current
-10
10
μA
tPULSEWIDTH
Pulsewidth for signals on EN1
and EN2 (high or low pulses)
1.0
unlimited
μs
For Pins EN1 and EN2
Do not leave EN1 and EN2
floating; (47kΩ pulldowns can
be used)
Table
6 – Protection Functions
Symbol
Parameter
Min
Typ
Max
Unit
Note
TOVTEMP
Overtemperature protection
140
°C
TOVTEMPHYST
Overtemperature protection
Hysteresis
5
°C
If the junction temperature
exceeds TOVTEMP, the current
sink will be disabled and the
charge pump switched back
into 1:1 mode until the
temperature drops below
TOVTEMP - TOVTEMPHYST
tFLASHTIMEOUT
Flash Timeout Time
-20%
800
+20%
ms
AS3685A, EN1=1, EN2=1 or
AS3685B flash modes


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