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EMD2080-00MA10NRR 데이터시트 PDF




Elite Semiconductor에서 제조한 전자 부품 EMD2080-00MA10NRR은 전자 산업 및 응용 분야에서
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부품번호 EMD2080-00MA10NRR 기능
기능 Constant Current LED Lighting Driver
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EMD2080-00MA10NRR 데이터시트, 핀배열, 회로
ESMT/EMP
Preliminary
EMD2080
Constant Current LED Lighting Driver
With PWM Dimming Control
General Description
The EMD2080 was designed with high efficiency step
up DC/DC converter with constant current source
for driving lighting LEDs. Wide input voltage range
makes the application more flexible. LED dimming
can be achieved with pulse width modulation
dimming on DIM pin. The EMD2080 switches at
1.2MHz and allows using small inductor and both of
input/output capacitors. An internal compensation
can reduce external component.
Features
g Supply Voltage: 6V ~ 30V
g Driving Current:
n Up to 500mA @VIN=12V, VOUT=22.4V
g Over Voltage Protection: 36V
g Shutdown Current < 1μA
g Reference Voltage 0.245V
g Internal Soft Start and Compensation
g 1.4A Internal power MOSFET Switch
g Thermal Shutdown Protection
The EMD2080 include current limit, over voltage and
thermal shutdown protection. The EMD2080 is
available in MSOP-10 package.
Applications
g Mood and Accent Lighting
g Automotive Lighting
g Ambient Lighting
g RGB LED Driver
Typical Application
Fig. 1
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc. Publication Date: Feb. 2012
Revision: 0.3
1/11




EMD2080-00MA10NRR pdf, 반도체, 판매, 대치품
ESMT/EMP
Function block
Preliminary
VIN VDD
EN Regulator
Current
sense
EMD2080
LX
Slope
compensation
Control
logic
OSC
internal
compensation
Comparator
DIM
Dimming
control
Vref
Fig. 2
Error
Amp.
PGND
HGND
AGND
OVP
FB
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc. Publication Date: Feb. 2012
Revision: 0.3
4/11

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EMD2080-00MA10NRR 전자부품, 판매, 대치품
ESMT/EMP
Preliminary
EMD2080
Application Information
Detailed Description
The EMD2080 is a constant frequency current-mode boost converter with constant current source and is
designed for WLEDs driver. This device provides the same output current through each WLED that get even
illumination. The fast operation frequency allows for small inductor and input/output capacitors.
During normal operation, the internal oscillators send a pulse signal to set latch and turn on internal MOSFET
each duty circle. A current sense voltage sums MOSFET current and slope signal connected to the negative
terminal of the PWM comparator. When this signal voltage exceeds output voltage of error amplifier, the PWM
comparator will send a signal to reset latch and turn off internal MOSFET. The output voltage of error amplifier is
magnified from the difference between reference voltage and feedback voltage. If reference voltage is
higher than feedback voltage, more current is delivered to the output, the other way, less current is delivered.
Enable / Disable
The EMD2080 enters shutdown mode when EN and DIM pins voltage are less 0.35V. When in shutdown mode,
all internal circuits of the EMD2080 are turn off and quiescent current is reduced to less than 1uA. When EN and
DIM pins voltage are higher than 1.2V, start-up begins.
DIM pin can be used for dimming control, the PWM frequency range is from 200Hz to 200kHz. The average LED
current is proportional to the PWM duty cycle, while 0% duty cycle triggers zero WLEDs current and 100% duty
cycle triggers full WLEDs current set by RISET (Eq.1).
OVP
When WLEDs are open, the boost control loop just like open loop operation, it may causes over voltage
damage on LX pin. In order to prevent this damage, the EMD2080 provides OVP function to protect it from
damage. The protection threshold is set at 36V.
OTP
The internal thermal sensor turn off power MOSFET when junction temperature is exceeded 160, the OTP is
designed with a 30hysteresis.
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc. Publication Date: Feb. 2012
Revision: 0.3
7/11

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관련 데이터시트

부품번호상세설명 및 기능제조사
EMD2080-00MA10NRR

Constant Current LED Lighting Driver

Elite Semiconductor
Elite Semiconductor

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