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AS3689 Datasheet(PDF) 25 Page - ams-OSRAM AG

Part # AS3689
Description  Flexible Lighting Management
PDF  72 Pages
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Manufacturer  AMSOSRAM [ams-OSRAM AG]
Direct Link  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3689 Datasheet(HTML) 25 Page - ams-OSRAM AG

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AS3689
austriami crosyst ems
Datasheet, Confidential
www.austriamicrosystems.com (mlg, ptr)
Revision 1.0.2 / 20070115
23 - 70
Table 10 – Current Sink Function Overview
Resolution
Current Sink
Max.
Voltage
(V)
Max.
Current
(mA)
(Bits)
(mA)
Software
Current
Control
Hardware On/Off
Control
Alternate Function
CURR1
CURR2
CURR6
15.0
38.25
8
0.15
Separate
LED Pattern;
PWM at GPIO;
Internal PWM
CURR30
CURR31
CURR32
CURR33
37.8
6
0.6
Combined in
Strobe/Preview
or
Separated
Flash LED Strobe
(GPI) & Preview
(GPIO);
PWM at GPIO;
Internal PWM;
Ext-Overtemp on
GPIO
LED Pattern
N/A
RGB1
RGB2
RGB3
38.25
8
0.15
Separate
LED Pattern;
PWM at GPIO;
Internal PWM
OLED Charge Pump
RGB3: LDO
CURR41
CURR42
CURR43
38.25
8
0.15
Separate
LED Pattern;
PWM at GPIO;
Internal PWM
CURR51
CURR52
VBAT
(5.5V)
38.25
8
0.15
Separate
LED Pattern;
PWM at GPIO;
Internal PWM
N/A
7.4.1 High Voltage Current Sinks CURR1, CURR2, CURR6
The high voltage current sinks have a resolution of 8 bits. Additionally an internal protection circuit monitors with
a voltage divider (max 3µA @ 15) the voltage on CURR1, CURR2 and CURR6 and increases the current in off
state in case of overvoltage. See section ‘Typical Operating Characteristics’ Figure ‘Current Sink CURR1,
CURR2, CURR6 Protection Current’. This shows the protection current versus applied voltage depending on the
register setting currX_prot_on (X=1,2 or 6).
External PWM control of these current sinks is possible and can be enabled by software (Input pin GPIO).
Table 11 – HV - Current Sinks Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Note
IBIT7
Current sink if Bit7 = 1
19.2
IBIT6
Current sink if Bit6 = 1
9.6
IBIT5
Current sink if Bit5 = 1
4.8
IBIT4
Current sink if Bit4 = 1
2.4
IBIT3
Current sink if Bit3 = 1
1.2
IBIT2
Current sink if Bit2 = 1
0.6
IBIT1
Current sink if Bit1 = 1
0.3
IBIT0
Current sink if Bit0 = 1
0.15
mA
For V(CURRx) > 0.45V



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