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AS3689 Datasheet(PDF) 9 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) 9 Page - ams-OSRAM AG

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AS3689
austriami crosyst ems
Datasheet, Confidential
www.austriamicrosystems.com (mlg, ptr)
Revision 1.0.2 / 20070115
7 - 70
Figure
7 – Current Sink CURR4x vs. VBAT
0
5
10
15
20
25
30
35
40
45
0,0
0,5
1,0
1,5
2,0
V(CURR41) [V]
CURR41=38.25mA
CURR41=4.8mA
Figure
8 – RGB Current Sinks RGBx vs. VBAT
7
Detailed Functional Description
7.1
Analog LDO
The LDO is a general purpose LDO and the output pin is shared with the current source (sink) connected to
RGB3. The design is optimized to deliver the best compromise between quiescent current and regulator
performance for battery powered devices.
Stability is guaranteed with ceramic output capacitors (see Figure 3) of 1µF ±20% (X5R) or 2.2µF +100/-50%
(Z5U). The low ESR of these capacitors ensures low output impedance at high frequencies. The low impedance
of the power transistor enables the device to deliver up to 150mA even at nearly discharged batteries without any
decrease in performance.
The LDO is off by default after startup (apply voltage on VDD_GPIO)
0
5
10
15
20
25
30
35
40
45
0,0
0,5
1,0
1,5
2,0
V(RGB1) [V]
RGB1=38.25mA
RGB1=4.8mA



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