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AS3687 PDF даташит

Спецификация AS3687 изготовлена ​​​​«austriamicrosystems» и имеет функцию, называемую «Flexible Lighting Management».

Детали детали

Номер произв AS3687
Описание Flexible Lighting Management
Производители austriamicrosystems
логотип austriamicrosystems логотип 

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AS3687 Даташит, Описание, Даташиты
AS3687/87XM
DDaatatsahseeht eet
AS3687/87XM
Flexible Lighting Management (Charge Pump, DCDC Step
Up, Seven Current Sinks, ADC, LED Test, Audio Light)
1 General Description
The AS3687/87XM is a highly-integrated CMOS
Lighting Management Unit for mobile telephones,
and other 1-cell Li+ or 3-cell NiMH powered
devices.
The AS3687/87XM incorporates one Step Up
DC/DC Converter for white backlight LEDs, one low
noise Charge Pump for indicator- or RGB- LEDs,
LED test circuit (production test of the soldered
LEDs at the customer site), one Analog-to-Digital
Converter, seven current sinks, a two wire serial
interface, and control logic all onto a single device.
Output voltages and output currents are fully
programmable. The AS3687XM has an audio input
to control one or two RGB LEDs.
The AS3687/87XM is a successor to the
austrimicrosystems AS3689 and therefore software
compatible to the AS3689 (software written for the
AS3689 can be easily reused for the
AS3687/87XM).
2 Key Features
ƒ High-Efficiency Step Up DC/DC Converter
Up to 25V/50mA for White LEDs
Programmable Output Voltage with
External Resistors and Serial Interface
Overvoltage Protection
ƒ High-Efficiency Low Noise Charge Pump
1:1, 1:1.5, and 1:2 Mode
Automatic Up Switching (can be disabled
and 1:2 mode can be blocked)
Output Current up to 150mA
Efficiency up to 95%
Only 4 External Capacitors Required:
2 x 500nF Flying Capacitors, 2 x 1µF
Input/Output Capacitors
Supports LCD White Backlight or RGB
LEDs
ƒ Seven Current Sinks
All seven current sinks fully Programmable
(8-bit) from: 0.15mA to 38.5mA (CURR1,
CURR2, CURR6, CURR30, CURR31,
CURR32, CURR33)
Three current sinks are High Voltage
capable (CURR1, CURR2, CURR6)
Selectively Enable/Disable Current Sinks
ƒ Internal PWM Generation
8 Bit resolution
Autonomous Logarithmic up/down
dimming
ƒ Led Pattern Generator
Autonomous driving for Fun RGB LEDs
Support indicator LEDs
ƒ 10-bit Successive Approximation ADC
27µs Conversion Time
Selectable Inputs: all current sources,
VBAT, CP_OUT, DCDC_FB
Internal Temp. Measurement
ƒ Support for automatic LED testing (open and
shorted LEDs can be identified in-circuit)
ƒ Standby LDO always on if serial interface is on
Regulated 2.5V max. output 10mA
3µA Quiescent Current
Automatic wakeup if serial interface is
enabled (allows ultra low power for device
shutdown)
ƒ Audio can be used to drive RGB LED
(AS3687XM only)
RGB Color and Brightness is dependent
on audio input amplitude
Can drive one or two RGB LEDs
ƒ Wide Battery Supply Range: 3.0 to 5.5V
ƒ Two Wire Serial Interface Control
ƒ Overcurrent and Thermal Protection
ƒ Small Package
WL-CSP 4x5 balls 0.5mm pitch
3 Application
Lighting-management for mobile telephones and
other 1-cell Li+ or 3-cell NiMH powered devices.
www.austriamicrosystems.com/AS3687
(mlg/ptr)
1v3-4
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AS3687 Даташит, Описание, Даташиты
AS3687/87XM
Datasheet
4 Block Diagram
Figure 1 – Application Diagram of the AS3687/AS3687XM
V2_5
C1
1µF
AASS33668877/
ALLSii3gg6hh8tti7innXggM
MMaannaaggeemmeenntt
Unniitt
8Bit PWM
Generator
Automatic Dimming
and LED Pattern
Generator
VBAT
References
and
Temperature
Supervision
LED
Test
Step Up DC/DC
Converter
Charge Pump
1:1, 1:1.5, 1:2
150mA
VDD_I/F
R4
1-10k
DATA
CLK
R5
DATA
CLK
Zero Power
Device
Wakeup
Serial
Interface
ADC
vtemp
currx
dcdc
Current Sinks
each 0.15-38.25mA
HV Current Sinks
each 0.15-38.25mA
Battery
C6
L1 1µF
10µH
D1
DCDC_GATE
DCDC_SNS
Q1
R1 R2
0.11M
DCDC_FB
Battery
VBAT
R3
100k
C2_P
C2_N
C2
C3 1µF
500nF
C1_P
C1_N
C4
500nF
C7
1.5nF
C8
15nF
D6
D7
D8
CPOUT
C9
4.7µF
D9 D12
D10 D13
D11 D14
D2 D3 D4 D5
CURR30
C5
1.0µF
CURR31
CURR32
CURR33
CURR1
CURR2
CURR6
VSS
www.austriamicrosystems.com/AS3687
1v3-4
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AS3687 Даташит, Описание, Даташиты
AS3687/87XM
Datasheet
Figure 2 – Application Diagram of the AS3687XM
V2_5
C1
1µF
AS3687XM
Lighting
Management
Unit
8Bit PWM
Generator
Automatic Dimming
and LED Pattern
Generator
VBAT
References
and
Temperature
Supervision
LED
Test
Step Up DC/DC
Converter
Charge Pump
1:1, 1:1.5, 1:2
150mA
VDD_I/F
R4
1-10k
DATA
CLK
DATA
CLK
Zero Power
Device
Wakeup
Serial
Interface
Current Sinks
each 0.15-38.25mA
ADC
vtemp
currx
dcdc
Audio Processing
HV Current Sinks
each 0.15-38.25mA
VSS
Alternative:
use DCDC step up
C6 for CURR1,2,6
L1 1µF
10µH
D1
DCDC_GATE
DCDC_SNS
Q1
R1 R2
0.11M
DCDC_FB
VBAT
Battery
C2_P
C2_N
C2
C3 1µF
500nF
C1_P
C1_N
C4
500nF
C7
1.5nF
C8
15nF
C9
4.7µF
CPOUT
CURR30
CURR31
DRGB1
C5
1.0µF
CURR32
CURR33/AUDIO_IN
C10
100nF
Alternative:
2nd Audio or Backlight
Audio IN
CURR1
CURR2
CURR6
DRGB2
D2 D3 D4
www.austriamicrosystems.com/AS3687
1v3-4
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