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GM2102 の電気的特性と機能

GM2102のメーカーはGammaです、この部品の機能は「CONSTANT CURRENT DC/DC WHITE LED DRIVER」です。


製品の詳細 ( Datasheet PDF )

部品番号 GM2102
部品説明 CONSTANT CURRENT DC/DC WHITE LED DRIVER
メーカ Gamma
ロゴ Gamma ロゴ 




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GM2102 Datasheet, GM2102 PDF,ピン配置, 機能
www.DataSheet4U.com
PRELIMINARY
GM2102
CONSTANT CURRENT DC/DC WHITE LED DRIVER
GENERAL DESCRIPTION
The GM2102 is a member of Gamma Microelectronics’s
family of white LED drivers.
The GM2102 is a fixed frequency step-up DC/DC
converter designed to operate as a constant-current
source. It is ideal for driving light emitting diodes (LEDs)
whose light intensity is proportional to the current
passing through them and not on the voltage across their
terminals as it directly regulates the output current.
The wide input voltage range allows the device to work
from a variety of input sources. A single external
resistor sets LED current between 5mA and 40mA,
which can then be easily adjusted using either a DC
voltage or a PWM signal. In Shutdown mode, the
LED’s are disconnected from the output with the
maximum quiescent current of 1µA for the entire circuit.
FEATURES
Drives Six White LED’s from 1.8 V
1.2Mhz Fixed Frequency Switching
Minimum operating input voltage 1.2V
90% efficiency
Accurately adjustable LED current
Current Regulation even when
Vin > Vout
Disconnects LED’s in Shutdown mode
Available in SOT23 Package ideal for
space conscious portable applications
TYPICAL APPLICATION
Vin
2.7V to 4.2V
6.8 uH
D1
C1
4.7 uF
PWM
DIMMING
CONTROL
SIGNAL
61
Vin SW
GM2102
53
SHDN
LED
Rset
GND
4 Rset
1.5K
2
C2
1 uF
15mA
APPLICATIONS
Cellular Phones
Digital Cameras
Handheld Computers
Portable Audio players
Pagers
Other White LED applications
Revision 1, March 2003 1 www.gammamicro.com

1 Page





GM2102 pdf, ピン配列
www.DataSheet4U.com
PRELIMINARY
GM2102
CONSTANT CURRENT DC/DC WHITE LED DRIVER
PIN CONFIGURATION
SW 1
GND
2
LED 3
GM2102
6 V in
5 SHDN
4 R set
6 Lead Plastic SOT23 Package
PIN FUNTIONS
Pin Function
SW (Pin 1) SWITCH PIN
GND (Pin 2) GROUND PIN
LED (Pin 3) LED PIN
Rset (Pin 4) RESISTOR PIN
SHDN ( Pin 5) SHUTDOWN PIN
Vin (Pin 6) INPUT SUPPLY PIN
Collector terminal of the Internal NPN Power Switch
Ground Reference Pin for the device
Collector terminal of the Internal NPN LED Switch to be connected to
the cathode of the last (bottom most) LED.
The terminal that would connect the external resistor to the device to
program the current that flows in the LED pin.
Pin used to control the GM2102 to operate in active mode (Set to
above V) or shutdown mode (below V)
Input Pin to provide the input supply voltage to the device.
Revision 1, March 2003 3 www.gammamicro.com


3Pages


GM2102 電子部品, 半導体
www.DataSheet4U.com
PRELIMINARY
GM2102
CONSTANT CURRENT DC/DC WHITE LED DRIVER
Vin
2.7 to 4.2 V
6.8 uH
D1
C1
4.7 uF
PWM
DIMMING
C ON TR OL
SIGNAL
61
Vin SW
GM2102
5
SHDN
3
LED
Rs et
GND
42
Rset
1.5K
C2
1 uF
15mA
Li-Ion Driver for Four White LEDs
Vin
2.7 to 4.2 V
4.7 uH
D1
C1
4.7 uF
PWM
DIMMING
C ON TR OL
SIGNAL
61
Vin SW
GM2102
5
SHDN
3
LED
Rs et
GND
42
C2
1 uF
Rset
1.5K
Li-Ion Driver for Five White LEDs
15mA
Vin
5V
10 uH
D1
Vin
3 to 4.2 V
4.7 uH
D1
C1
4.7 uF
61
Vin SW
GM2102
5
SHDN
3
LED
Rset
51.1 K
5 V DC
DIMMING
CONTROL
4
GND
2
C2
2.2 uF
Rset
750 ohms
100 ohms
100 ohms
30mA
5V Driver for 16 White LEDs
Revision 1, March 2003
6
C1
4.7 uF
61
Vin SW
GM2102
53
SHDN
LED
Rset
GND
80.6 K
3.3 V DC
DIMMING
CONTROL
4
2
Rset
1.5K
C2
1 uF
15mA
Li-Ion Driver for Eight White LEDs
www.gammamicro.com

6 Page



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部品番号部品説明メーカ
GM2102

CONSTANT CURRENT DC/DC WHITE LED DRIVER

Gamma
Gamma


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