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AS3685A Datasheet(PDF) 5 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Part No. AS3685A
Description  Ultra Small High Efficiency 1000mA Charge Pump
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Maker  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Homepage  http://www.taosinc.com
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AS3685A Datasheet(HTML) 5 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

 
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AS3685A/AS3685B
Datasheet
www.austriamicrosystems.com/
AS3685
(ptr)
Revision 2.2
4 - 24
Table
2 – Operating Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Note
0.85
mA
1:1 Mode
6.6
mA
1:1.5 Mode
IOPERATING
Power Consumption without
load
8.1
mA
1:2 Mode
5.3 Electrical Characteristics
Table
3 – Charge Pump Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Note
V(VCP) Output voltage
without load – do not short to
VSS
VBAT *
CP-
mode
V
CP-mode is 1, 1.5 or 2
(automatically selected)
VCPOUT
Output limitation
5.4
5.6
internally limited
0.28
0.53
1:1 Mode
VBAT = 3.6V, ICPOUT = 200mA
1.37
2.00
1:1.5 Mode
VBAT = 3.3V, ICPOUT = 500mA,
TJUNCTION<=85°C
RCP
Charge Pump effective
Resistance
1.95
2.44
1:2 Mode
VBAT = 3.0V, ICPOUT=700mA,
TJUNCTION<=85°C
Eta
Efficiency
75
93
%
Vin=3.0V-4.5V, Iout=100mA
(Charge Pump alone)
VRIPPLE
Output ripple voltage
100
mVpp
Vin=3.0-4.5V, Iout=350mA,
fclk
Operating Frequency
-20%
1.0
+20%
MHz
tUP_DEB_LONG
Initial Mode Switching
Debounce Time
256
μs
Mode switching up-debounce
time after enabling of the
charge pump or after mode
switching between 1:1 to 1:1.5
tUP_DEB
Mode Switching Debounce
Time
16
μs
Mode switching up-debounce
time in normal operation
Table
4 – Current Source (Sink) Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Note
ILED
Output Current Range
700
1000
mA
700mA: RISET = 14.2kΩ
1000mA: RISET = 10kΩ
IACCURACY
Current Setting Accuracy
-10%
500
+10%
mA
Measured with RISET = 19.9kΩ
and maximum flash current
VISET
Current Generator Set Point
Voltage (pin ISET)
1.3
V
IISET
Current Generator operating
range
10.0
130
μA
IISET = VISET / RISET
if the resulting bias current is
higher than 200
μA (typ.), the
current source is disabled
IFLASH2ISET
Flash Current to Bias Current
Ratio
7650
A/A
AS3685A, EN1=1, EN2=1 or
AS3685B at full flash current
(700mA with RISET = 14.2kΩ)


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