Datasheet

ManualsBrandsON SEMICONDUCTOR ManualsDev KitsPCB design board

51012 SY/42512 SY 20120323-S00003 No.A2042-1/16

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

August, 2013

LV5026MC

Overview

LV5026MC is a High voltage LED drive controller which drives LED current up to 3A with external MOSFET.

LV5026MC 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 LV5026MC 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 • Short protection circuit

• Various Dimming Control • Selectable reference Voltage

-TRIAC & Analog Input & PWM Input -Internal 0.605V & External Input Voltage

• Soft Start function • Low noise switching system/skip frequency function

• Built-in TRIAC stabilized function - 5 stages skip mode Frequency

• Built-in circuit of detection of overvoltage of CS pin. - Soft driving

• Selectable Switching frequency [50kHz or 70kHz, open: 50kHz]

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum input voltage V

max (Note1) -0.3 to 42 V

REF_OUT, REF_IN, RT, CS,

PWM_D, ACS

-0.3 to 7 V

OUT1 pin V

OUT

_abs -0.3 to 42 V

OUT2 pin V

OUT

2_abs -0.3 to 42 V

Allowable power dissipation Pd max With specified board* 1.0 W

Junction temperature Tj 150 °C

Operating junction temperature Topj (Note2) -30 to +125 °C

Storage temperature Tstg -40 to +150 °C

*1 Specified board: 58.0mm × 54.0mm × 1.6mm (glass epoxy board)

Note1) Absolute maximum ratings represent the values which cannot be exceeded for any length of time.

Note2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high

voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.

Bi-CMOS IC

LED Driver IC

Orderin

numbe

: ENA2042A

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

Summary of content (16 pages)

PAGE 1
Ordering number : ENA2042A LV5026MC Bi-CMOS IC LED Driver IC http://onsemi.com Overview LV5026MC is a High voltage LED drive controller which drives LED current up to 3A with external MOSFET. LV5026MC 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 LV5026MC is designed or developed for general use or consumer appliance.
PAGE 2
LV5026MC Recommended Operating Conditions at Ta = 25°C Parameter Input voltage Symbol Conditions Ratings VIN Unit 8.5 to 24 V * Note : supply the stabilized voltage. Electrical Characteristics at Ta = 25°C, VIN = 12V, unless otherwise specified. Parameter Symbol Ratings Conditions Unit min typ max 0.585 0.605 0.625 Reference voltage block Built-in reference voltage VREF VREF VIN line regulation VREF_LN VIN = 8.5 to 24V Reference output voltage REFOUT IREFOUT = 0.
PAGE 3
LV5026MC Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max TRIAC Stabilization circuit Threshold of OUT2 VACS OUT2 = High [less than right record] 2.8 3.0 3.2 V OUT2 sink current IO2I VIN = 12V, OUT2 = 6V 0.6 mA OUT2 source current IO2O VIN = 12V, OUT2 = 6V 0.6 mA UVLO mode VIN current ICCOFF VIN < UVLOON 80 Normal mode VIN current ICCON VIN > UVLOON, OUT = OPEN 0.
PAGE 4
LV5026MC Block Diagram VIN Built-in REGULATOR REF_OUT UVLO TSD 3.0V OVP REFERENCE VOLTAGE 0.
PAGE 5
LV5026MC Pin Functions Pin No. 1 Pin name RT Pin function Equivalent circuit Switching frequency selection pin. VREF-OUT (3V typ) L or Open : 50kHz switching, H: 70 kHz switching. RT In case of 70kHz,connect RT pin to REFOUT pin. 1kΩ on time GND 2 REF_OUT Built-in 3V Regulate out Pin. VIN If this function isn’t used, please connect to nothing. VREF-OUT (3V typ) GND 3 REF_IN External LED current Limit Setting pin. If less than VIN VREF (0.
PAGE 6
LV5026MC LED current and inductande setting • Relation ship beween REF_IN and CS pin voltage(Power Factor Crrection(PFC)) The output current value is the average of the current value that flows during one cycle. The current value that flows into coil is a triangular wave shown in the figure below. Make sure to set Ipk so that (average of current value at one cycle) is equal to (LED current value).Ipk is set by the relationship between REF_IN voltage and Rcs voltage.
PAGE 7
LV5026MC Given that the period when current flows into coil is T_c+T_d DutyI = T 1 Ipk × 2 × (Duty × T)/T = ILED 2 × ILED VREF_IN Ipk × DutyI (1) since Ipk × Rcs VFEF_IN DutyI × VFEF_IN = (2) Rcs × 2ILED Ipk Ipk: peak inductor current Vf: LED forward voltage drop Vac: effective value(R.M.S value) VREF: Built-in reference voltage (0.
PAGE 8
LV5026MC (for Isolation circuit) Using the circuit diagram below, the wave form of the current that flows to Np and Ns is as follows. Current waveform flows to primary side and secondary. Vac a blockdiagram in outline Ip (Primary side current) LP (Np) Ls (Ns) Vac REF_IN R1 CLK Vzd REF_IN + - CS VREF (0.605V)typ Q RESET Ip (primary side) OUT Ip slope is proportion to Vac voltage (REF pin voltage) T ON VREF (0.
PAGE 9
LV5026MC Sense resistor is obtained as follows.
PAGE 10
LV5026MC 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. R2 ACS = Vac × R1+R2 2. Bleeder current setting Rd set hold current at Triac dimmer. Bleeder current is set at Rd depending on Triac dimmer.
PAGE 11
LV5026MC Description of operation protection function tilte outline monitor point 1 UVLO Under voltage lock out 2 OCP Over current protection CS voltage 3 OVP Over voltage protection VCC voltage 4 OTP Over Temperature Protection PN Junction temperature (TSD) (Thermal Shut Down) note VCC voltage available FET current 1. UVLO (Under voltage lock out) If VIN voltage is 7.3V or lower, then UVLO operates and the IC stops.
PAGE 12
LV5026MC 3. OVP (Over voltage protection) If the voltage of VIN pin is higher than the internal reference voltage VINOVP (27V typ), switching operation is stopped. The stopping operation is kept until the voltage of VIN is lower than 7.3V. If the voltage of VIN pin is higher than 9V, the switching operation is restated. VIN voltage A OVP B OVP reset C Operation start 27V typ 9V typ 7.3V typ Time Outputstage Time on off on 4.
PAGE 13
LV5026MC PWM dimmer function LED current can be adjusted according to Duty of PWM pulse input to PWM dimmer pin. PWM pulse is High (2V to 5V) then switching operation stops, and LED current stops flowing. PWM pulse is Low (under 0.6V), then switching operation stop is released, and it returns to normal operation. An outline of PWM_D pin LED current vs PWM_D duty (outline) LED current PWM_D max Threshold voltage, 1.5V (typ). (note) at PWM_D pin, input voltage is, 2V avove - output OFF 0.
PAGE 14
LV5026MC VREF – Ta 3.2 Reference output voltage, REFOUT -- V Built-in reference voltage, VREF -- V 0.63 0.62 0.61 VIN = 8.5V VIN = 12V VIN = 24V 0.6 0.59 0.58 --50 0 50 100 REFOUT – Ta IREF_OUT = 0.5mA 3.1 3 2.9 2.8 --50 150 0 UVLOON, UVLOOFF – Ta 10 UVLOON 7 6 0 50 100 2 1.5 1 0.5 0 --50 150 0 FOSC1 – Ta 100 150 FOSC2 – Ta 80 = V 24V I .5V N = 12 V 70 V IN 65 =8 V 1 24 = IN V V IN 5V 8.
PAGE 15
LV5026MC IOO – Ta 0.15 0.1 0.05 0 --50 IOI – VO 2000 OUT sink current, IOI -- mA OUT source current, IOO -- A 0.2 Ta = -40°C Ta = 0°C Ta = 25°C 1500 Ta = 80°C Ta = 125°C Ta = 150°C 1000 500 0 0 50 100 150 0 1 Ambient temperature, Ta -- °C VACS – Ta 3.1 3 2.9 2.8 --50 0 50 100 UVLO mode VIN current, ICCOFF -- μA OUT2 source current, IO2O -- mA 1 0.
PAGE 16
VINOVP – Ta 30 29 28 27 26 25 --50 0 50 CSOCP – Ta 3 Abnormal sensing voltage, CSOCP -- V VIN over voltage protection voltage, VINOVP -- V LV5026MC 100 Ambient temperature, Ta -- °C 150 2.5 2 1.5 1 0.5 0 --50 0 50 100 150 Ambient temperature, Ta -- °C ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.