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PDF LV5012MD-AH Data sheet ( Hoja de datos )
| Número de pieza | LV5012MD-AH | |
| Descripción | LED Driver IC | |
| Fabricantes | ON Semiconductor | |
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Ordering number : ENA2186A
LV5012MD
Bi-CMOS LSI
LED Driver IC
http://onsemi.com
Overview
LV5012MD is a High Voltage LED drive controller which drives LED current with external MOS FET. LV5012MD is
realized a simple LED circuit with a few external parts and reduce circuit board space.
It corresponds to various dimming controls including the TRIAC dimming control without flickering. LV5012MD is
realized high efficiency due to low operation current.
Function
High Voltage LED Controller
Various Dimming Control
- TRIAC & Analog Input & PWM Input
Fixed Switching Frequency [70 kHz]
Multiple Internal Reference Voltage
-Auto Level Control Output & 0.45V & 0.1V
Short Protection Circuit – [latch off]
Over Voltage Protection – [auto recovery circuit]
2Staged Thermal Protection– [auto recovery circuit]
External Thermal Protection Adopted
Built-in TRIAC Stabilized function.
MFP14S(225mil)
ORDERING INFORMATION
See detailed ordering and shipping information on page 16 of this data sheet.
Semiconductor Components Industries, LLC, 2013
October, 2013
O2313HK 20131009-S00002/51513HK No.A2186- 1/16
1 page  
Pin Function
No Pin Symbol
1 HV
2 DML
3 NC
4 GND
5 ENB
6 ACS
7 REF_OUT
8 ALC_C
9 TRC
10 REF_IN
11 CS
12 VIN
13 GND
14 OUT
LV5012MD
Pin description
Please connect about 10k between this pin and the rectified AC voltage. Thereby HV regulator for IC
startups operates.
This pin is Drain of internal bleeder MOSFET.
This pin is used in TRIAC dimming applications for TRIAC stabilization. Please connect the resistor ”Rbl”
between this pin and the rectified AC voltage. If ACS pin is below 0.85V, the internal bleeder MOS is
turned on and bleeder current flows. Please set ”Rbl” so that the voltage of DML pin does not exceed 55V
when the bleeder MOS is turned on.
[If this function not used, do not connect.]
No connect pin
GND pin.
Switching Operation ON/OFF pin. If the input of this pin is above 2V, OUT pin is fixed Low. If the input of
this pin is below 1.8V, normal operation is started.
Connect it to GND when unused.
This pin senses the rectified AC voltage for TRIAC dimming.
If the voltage of this pin is below 0.85V, the internal bleeder MOS is turned on and bleeder current flows.
If the voltage of this pin is above 1.7V, LV5012MD recognizes “TRIAC ON”. If the voltage of this pin is
below 1.3V, LV5012MD recognizes “TRIAC OFF”.
[If this function not used, please connect to REF_OUT pin.]
Reference Voltage (3.0V) output pin.
This pin is used for Auto Level Control (ALC) function. Please connect a capacitor of about 0.1F to GND.
Thereby ALC_C pin can output the smoothing value of REF_IN pin voltage.
Please connect a capacitor about 1F to GND, and a resistor about 4.7M to VIN.
If this pin is below 0.05V, the operation is stopped and VIN current is less than 250A (typ). If this pin is
above 0.1V, the operation is started.
This pin senses the rectified AC voltage for the ALC function.
Current sense pin.
When CS pin voltage exceeds the reference, the power MOSFET is turned off. (The details of the
reference are described in following “Functional description”.)
If this pin voltage exceeds 1.9V, LV5012MD stops switching.
Power supply pin.
Operation : VIN > UVLOON(9V)
Stop : VIN < UVLOOFF(7.3V)
Switching Stop : VIN > VINOVP(27V)
Pull down to GND : VIN > 28V
GND pin.
The external power MOSFET is driven by this pin. Please connect to MOSFET gate.
No.A2186-5/16
5 Page 
LV5012MD
Functional description
LV5012MD is an LED driver IC that operates directly from the rectified AC voltage. LV5012MD controls brightness of
the LED by controlling a peak current of the MOSFET.
1. Start up function
LV5012MD has a high voltage regulator built-in for self-supplying
from the rectified AC voltage. It outputs 12V, and thereby the circuit
in the IC starts. Please connect about 10kΩ between HV pin and the
rectified AC voltage to operate HV regulator normally.
2. Peak current control
LV5012MD detects the current of external MOSFET as shown in the following diagram. The current that flows into
MOSFET is a triangular wave shown in the diagram. The current peak value is determined by the relationship between the
internal reference level and CS voltage. This relationship makes Power Factor Correction (PFC). CS voltage is used by
internal comparator to compare to the reference level. And OUT pin outputs the signal for MOSFET control. LV5012MD
controls the peak value of MOSFET current.
Here, the reference level is lower value of either “ALC_out” or “VREF(0.45V)”. ( “ALC_out” is described in “3. Auto
Level Control function”.)
Rectified
AC voltage
0.5Vtyp
VREF
(0.45Vtyp)
ALC_out
FET
current
Reference
R1,R2 : External resistor for REF_IN pin setting
Rcs : External resistor for current sense
M1 : External Power MOSFET
OUT
(FET Gate)
T
ON
OFF
Ton Toff
Reference=ALC_out
Reference
=0.45V
Reference=ALC_out
The peak value of MOSFET current (Ipk) is determined by :
In the case of “ALC_out < VREF(0.45V)” Ipk ALC _ out
Rcs
In the case of “ALC_out > VREF(0.45V)” Ipk 0.45V
Rcs
No.A2186-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LV5012MD-AH.PDF ] | |
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