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PDF LV5028TT Data sheet ( Hoja de datos )
| Número de pieza | LV5028TT | |
| Descripción | LED Driver IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENA1999
LV5028TT
Bi-CMOS IC
LED Driver IC
Overview
LV5028TT is a High voltage LED drive controller which drives LED current up to 3A with external MOSFET.
LV5028TT is realized very simple LED circuits with a few external parts. It corresponds to various wide dimming
controls including the TRIAC dimming control.
Note) This LV5028TT is designed or developed for general use or consumer appliance. Therefore, it is NOT permitted
to use for automotive, communication, office equipment, industrial equipment.
Functions
• High voltage LED controller
• Switching frequency: 50kHz
• Soft Start function
• Built-in TRIAC stabilized function
• Built-in circuit of detection of overvoltage of CS pin.
• Corresponds to TRIAC stabilized
• Selectable reference Voltage
-Internal 0.605V & External Input Voltage
• Low noise switching system/skip frequency function
- 5 stages skip mode Frequency
- Soft driving
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum input voltage
REF_OUT, REF_IN, CS,
PWM_D, ACS
OUT1 pin
OUT2 pin
Allowable power dissipation
Symbol
VIN max (Note1)
VOUT_abs
VOUT2_abs
Pd max
Conditions
With specified board*
Ratings
-0.3 to 42
-0.3 to 7
Unit
V
V
-0.3 to 42
-0.3 to 42
1.0
V
V
W
Continued on next page.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment. The products mentioned herein
shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life,
aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system,
safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives
in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any
guarantee thereof. If you should intend to use our products for new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the
intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely
responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
D0711 SY 20111118-S00001 No.A1999-1/16
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Pin Functions
Pin No.
Pin name
1 ACS
LV5028TT
Pin function
ACS pin senses AC Voltage.
If this function isn’t used, please connect GND.
2 REF_OUT
Built-in 3V Regulate out Pin.
If this function isn’t used, please connect to nothing.
3 REF_IN
4 CS
5 GND
6 OUT
7 VIN
8 OUT2
External LED current Limit Setting pin. If less than
VREF (0.61V) voltage is input, Peak current value is
used at the input voltage. If more than REF_IN voltage
is input, it is done at VREF voltage. If this function isn’t
used, please connect nothing.
CS
LED current sensing in. If this terminal voltage
exceeds VREF (Or REF_IN), external FET is OFF.
And if the voltage of the terminal exceeds 1.9V,
LV5028TT turns to latch-off mod
CS
GND pin.
Driving the external FET Gate Pin.
Power supply pin. Operation
: VIN > UVLOON Stop: VIN < UVLOOFF
Switching Stop : VIN > VINOVP
This pin drive the FET which is stabilized the TRIAC
dimming application.
If ACS is less than 3V, OUT2 turn High voltage.
If this function isn’t used, please connect nothing.
Equivalent circuit
VIN
ACS
GND
VIN
VREF-OUT
(3V typ)
GND
VIN
REF_IN
GND
VIN
REF_IN
GND
VIN
OUT
GND
VIN
1kΩ
OUT2
GND
No.A1999-5/16
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
LV5028TT
Bleeder current cuircuit for TRIAC dimmer
1. Operating voltage setting
ACS pin voltage set operating voltage at OUT2. ACS pin threshold volage is 3V typ.
OUT2 operating voltage is set by R1 and R2. R1 and R2 is determined below.
ACS
=
Vac
×
R2
R1+R2
2. Bleeder current setting
Rd set hold current at Triac dimmer.
Bleeder current is set at Rd depending on Triac dimmer.
a blockdiagram in outline
a blockdiagram in outline
R1
ACS
-
R2 +
VACS
(3V typ)
OUT2
Rd
VAC voltage is Low,
OUT2 is High voltage
Vac
Triac dimmer, OFF
Bleeder circuit, ON (OUT2; high)
ACS
OUT2
OUT
VACS (3V typ)
off on off on off
on min on min on
on on
No.A1999-11/16
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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| PDF Descargar | [ Datasheet LV5028TT.PDF ] | |
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