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AS3677 データシート(PDF) 64 Page - ams AG

部品番号 AS3677
部品情報  Triple Channel Lighting Management Unit with DCDC step/up, ALS, 2xDLS(=DBC) and RGB Driver
PDF  68 Pages
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メーカー  AMSCO [ams AG]
ホームページ  http://www.ams.com
Logo AMSCO - ams AG

AS3677 データシート(HTML) 64 Page - ams AG

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AS3677
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
10 Application Information
10.1 External Components
10.2 Layout Recommendations
1. GND Planes: Connect the VSS pins (B4, B5) to the low noise GND-plane.
VSS_DCDC (A4) should be connected to a separated GND-plane. Connect also the charge pump output
capacitor (C5) and the DCDC-caps (C1, C2) to this separated GND-plane. Connect all other blocking caps to
the low noise GND-plane. Keep the area of the separated GND plane as small as possible and connect it to
the star point of the low noise GND plane. Do not connect VSS (B4, B5) directly to VSS_DCDC (A4).
2. Supplies: The pins VBAT (B3) and VBAT_CP (A3) can be connected directly together. Put a blocking Cap
close to VBAT_CP.
3. DCDC: Put L1, D1, C1 and C2 close together and also close to the pins SW (A5) and VSS_DCDC (A4).
4. LDO: Put C3 close to pin VANA (C1)
Table 99. External Components List
Part Number
Min
Value
Typ
Max
tol.
(min.)
Rating
(max)
Notes
Package
(min.)
1
1. in 1/100 inch (unless otherwise specified)
C1
2.2µF
±20%
6.3V
Ceramic, X5R (Vana1 output)
(e.g. Taiyo Yuden
JMK107BJ225MA-T or
LMK107BJ225MA)
only required if LDO is used
0603
C2
4.7µF
±20%
25V
Ceramic, X5R, X7R (Step Up
DCDC output)
(e.g. Taiyo Yuden
TMK316BJ475KD)
1206
(0805)
3.2x1.6x0.
85mm
C3
100nF
±20%
6.3V
Ceramic, X5R (LDO output
capacitor) (e.g. Taiyo Yuden
JMK063BJ104KP-F)
0402
C4
470nF
±20%
6.3V
Ceramic, X5R (Charge Pump
flying capacitor) (e.g. Taiyo
Yuden JMK105BJ474KV-F)
0402
C5
1µF
±20%
6.3V
Ceramic, X5R (Charge Pump
output) (e.g. Taiyo Yuden
JMK105BJ105KV-F)
0402
R1
1-10k
Ω
DATA Pullup resistor – usually
already inside master
0201
R2
CLK Pullup resistor – usually
already inside master
0201
L1
10µH
±20%
Recommended Type:
Murata LQH3NPN100NJ0 or
Panasonic ELLSFG100MA
or TDK VLF3012A or Taiyo
Yuden NRH3012T100MN
(7µH min. at 600mA)
3x3x
1.2mm (H
is max)
D1
PMEG4010BEA
Schottky diode
SOT666
1.6x1.6x0.
6mm
X1
Light Sensor
e.g. Rohm BH1620FVC or
Toshiba TPS856
1.6x1.6x
0.55mm
D2:D10
LED
As required by application



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