PRELIMINARY
GM2102
CONSTANT CURRENT DC/DC WHITE LED DRIVER
GENERAL DESCRIPTION
The
GM2102
is a member of
Gamma Microelectronics鈥檚
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鈥檚 are disconnected from the output with the
maximum quiescent current of 1碌A(chǔ) for the entire circuit.
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Drives Six White LED鈥檚 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鈥檚 in Shutdown mode
Available in SOT23 Package ideal for
space conscious portable applications
TYPICAL APPLICATION
6.8 uH
D1
APPLICATIONS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cellular Phones
Digital Cameras
Handheld Computers
Portable Audio players
Pagers
Other White LED applications
Vin
2.7V to 4.2V
6
C1
4.7 uF
1
SW
C2
1 uF
Vin
PWM
DIMMING
CONTROL
SIGNAL
5
GM2102
SHDN
Rset
4
Rset
1.5K
LED
GND
2
3
15mA
Revision 1, March 2003
1
www.gammamicro.com
GM2102相關(guān)型號PDF文件下載
-
型號
版本
描述
廠商
下載
-
英文版
CONSTANT CURRENT DC/DC WHITE LED DRIVER
ETC
-
英文版
CONSTANT CURRENT DC/DC WHITE LED DRIVER
ETC [ETC]
-
英文版
XGA/SXGA LCD Controller
ETC
-
英文版
XGA/SXGA LCD Monitor Controller with Intergrated Analog Inte...
ETC [ETC]
-
英文版
XGA/SXGA LCD Controller
ETC [ETC]
-
英文版
CMOS POSITIVE VOLTAGE REGULATOR
GTM [GTM C...
-
英文版
CMOS POSITIVE VOLTAGE REGULATOR
GTM [GTM C...
-
英文版
ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER
ETC
-
英文版
ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER
ETC [ETC]
-
英文版
ANALOG-INTERFACE ONPANEL XGA LCD CONTROLLER WITH RSDS TRANSM...
ETC
-
英文版
ANALOG-INTERFACE ONPANEL XGA LCD CONTROLLER WITH RSDS TRANSM...
ETC [ETC]
-
英文版
XGA/SXGA LCD Controller
ETC
-
英文版
XGA/SXGA LCD Monitor Controller with Intergrated Analog Inte...
ETC [ETC]
-
英文版
XGA/SXGA LCD Controller
ETC [ETC]
-
英文版
SXGA LCD Monitor Controller with Integrated Analog Interface...
ETC
-
英文版
SXGA LCD Monitor Controller with Integrated Analog Interface...
ETC [ETC]
-
英文版
CMOS POSITIVE VOLTAGE REGULATOR
GTM [GTM C...
-
英文版
ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER
ETC
-
英文版
ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER
ETC [ETC]
-
英文版
ANALOG INTERFACE ONPANEL SXGA LCD CONTROLLER WITH RSDS TRANS...
ETC
1
2
3
4
5
6
