GM9910B Datasheet PDF - Gamma
| Part Number | GM9910B | |
| Description | UNIVERAL HIGH BRIGHTNESS LED DRIVER | |
| Manufacturers | Gamma | |
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GM9910B
UNIVERAL HIGH BRIGHTNESS
LED DRIVER
Description
The GM9910B is a PWM high efficiency control
LED driver IC. It allows efficient operation of
High Brightness (HB) LEDs from voltage sources
ranging from 10VDC up to 500VDC, this feature
allows GM9910B can work from a wide range of
input voltages without the need for an external
low voltage supply.
By using a single resistor, the switching
frequency to control the external MOSFET can
be fixed up to 300KHz. GM9910B is constant
current LED driver, which enhance the reliability.
The output current can be programmed between
a few milliamps and up to more than 1.0A.
GM9910B uses a rugged high voltage junction
isolated process that can withstand an input
voltage surge of up to 500V. Output current to an
LED string can be programmed to any value
between zero and its maximum value by
applying an external control voltage at the linear
dimming control input of the GM9910B. The
GM9910B provides a low-frequency PWM
dimming input that can accept an external
control signal with a duty ratio of 0-100% and a
frequency of up to a few kilohertz.
Features
> 90% efficiency
Wide input range – 10V to 500V
Constant current LED driver
Applications from a few mA to more than
1A
LED string from one to hundreds of
diodes
PWM low frequency dimming via enable
pin
Input voltage surge rating up to 500V
Applications
AC/DC or DC/DC LED Driver Applications
RGB Backlighting LED Driver
Back Lighting of Flat Panel Displays
General Purpose Constant Current
Source
Typical Application Circuit
CIN
VIN
PWMD GATE
GM9910B
VDD
LD CS
RT GND
CDD
RT
CO
D1
L1
RCS
www.gammamicro.com.tw 1
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GM9910B
UNIVERAL HIGH BRIGHTNESS
LED DRIVER
Electrical Characteristics (TA = 25°C, unless otherwise specified)
Parameter
Input DC supply voltage
range
Shut-Down mode
supply current
Internally regulated
voltage
Maximum VDD voltage
VDD current available
for external circuitry
VDD under voltage
lockout threshold
VDD under voltage
lockout hysteresis
Pin PWMD input low
voltage
Pin PWMD input high
voltage
Pin PWMD pull-down
resistance
Current sense pull-in
threshold
GATE high output
voltage
GATE low output
voltage
Oscillator frequency
Maximum Oscillator
PWM Duty Cycle
Linear Dimming pin
voltage range
Current sense blanking
interval
Delay from CS trip to
GATE lo
Symbol
VINDC
IINSD
VDD
VDDmax
IDD(ext)
UVLO
ΔUVLO
VEN(lo)
VEN(hi)
REN
VCS(hi)
VGATE(hi)
VGATE(lo)
fOSC
DMAXhf
VLD
tBLANK
tDELAY
Test Conditions
DC Input Voltage
Pin PWMD to GND, VIN = 8V
VIN = 10 to 500V, IDD(ext)=0, pin
GATE is open
When an external voltage applied
to pin VDD
VIN = 10–100V
VIN rising
VIN falling
VIN = 10–500V
VIN = 10–500V
Pin PWMD = 5V
TA = -40°C to +85°C
IOUT = 10mA
IOUT = -10mA
RT = 1.00MΩ
RT = 226kΩ
fPWMhf = 25kHz, at GATE, CS to
GND.
TA ≤ 85°C, VIN = 12V
VCS = 0.55VLD, VLD = VDD
VIN = 12V, VLD = 0.15, VCS = 0
to 0.22V after tBLANK
GATE output rise time
tRISE
CGATE = 500pF
Min
10
0.5
7.0
6.45
2.4
50
243.5
VDD-0.3
0
20
80
0
150
30
GATE output fall time
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
tFALL
TTST
THYS
CGATE = 500pF
30
Typ Max Unit
500 V
1.0 mA
7.5 8.0 V
10 V
1.0 mA
6.7 6.95 V
500 mV
1.0 V
V
100 150 kΩ
250 257.5 mV
VDD V
0.3 V
25 30
kHz
100 120
100%
250 mV
215 280
ns
300 ns
50 ns
50 ns
150 °C
40 °C
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for GM9910B electronic component. |
| Information | Total 8 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ GM9910B.PDF Datasheet ] | |
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