KB1365

KB1365 KINGBOR | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 9

Technical content

• High-Side Current Sense
• 20kHz Maximum Dimming Frequency
• Hysteretic Control: No Compensation
• Dedicated Dimming Control Input
• Up to 2MHz Switching Frequency
• Adjustable Constant LED Current
• Up to 5A Constant Current Output
• 5V, 10mA On-Board Regulator
• -40 to +125 Operating Temperature Range
• SOT23-6 package
• MR16 and Other LED Bulbs
• Power Led driver
• Constant Current Source! The KB1365, step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective solution for automotive interior/exterior lighting,architectural and ambient lighting, LED bulbs such as MR16 and other The KB1365 operate from a 5.5V to 40V input voltage range and feature a 5V/10mA on-board regulator. A high- side current-sense resistor adjusts the output current and a dedicated PWM input (DIM) enables a wide range of pulsed The KB1365 is well suited for applications requiring a wide input voltage range. The high-side current- sensing and an integrated current-setting circuitry minim- ize the number of external components while deliv- switching frequency, thus allowing for small component size. KB1365 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052

APPLICATIONS

REV: 1.0 DRV GND VCCIN Power LED Driver CS KB1365

• 5.5V to 40V Input Voltage Range
• 200mV Low Reference V oltage(5%) LED illumination applications. dimming. ering an LED current with +/-5% accuracy. A hys- teretic control algorithm ensures excellent input-supply rejection and fast response during load transients and PWM dimming. The KB1365 features a 20% inductor current ripple. These devices operate up to 2MHz к к CSN DIM COMPARATOR REGULATOR GATE DRIVER UVLO –COMPARATOR DIM BUFFER 1.23V IN-200mV 20mV .-/3 TOU(4YPU( 2S PWM Signal 1/H9262F 4.7/H9262F 4.7/H9262F2 6). 2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming On Page 4 See Note2

Part number Package Marking KB1365 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PIN CONFIGURATION ORDER INFORMATION PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS REV: 1.0 SOT23-6 KB1365GRE SOT23-6,Green xxxx,Date Code with one bottom line CSN 1 DIM IN GND VCC

5 DRV

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Maximum Current into Any Pin (except IN, V Continuous Power Dissipation (TA = +70°C) 6-Pin SOT *As per JEDEC51 Standard (Single-Layer Board). PIN NAME FUNCTION 1 IN Positive Supply Voltage Input. Bypass with a 1µF or higher value capacitor to GND.

2 CSN Current-Sense Input

3 DIM Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to enable the current regulator.

4 GND Ground

5 DRV Gate Drive Output. Connect to the gate of an external n-channel MOSFET. 6V CC Voltage Regulator Output. Connect a 1µF capacitor from VCC to GND. SOT23-6 SOT23-6

Min. Typ. Max. Unit Power supply voltage V IN 5.5 ѧ 40 V Operating temperature Top -40 +25 +125 к KB1365 Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052

ELECTRICAL CHARACTERISTICS

RECOMMENDED OPERATION CONDITIONS REV: 1.0 (VIN = 12V, V DIM = VCC, CVCC = 1µF, R SENSE = 0.51, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V IN 5.5 40.0 V Maximum Current Regulator Switching Frequency fSW 2 MHz Ground Current I GND DRV open 1.5 mA Supply Current I IN VDIM < 0.6V 425 µA VIN = VCSN = VDIM, VIN rising from 4V until VDRV > VCC - 0.5V 4.7 5.0 Undervoltage Lockout UVLO VIN = VCSN = VDIM, VIN falling from 6V, VDRV < 0.5V 4.5 V Undervoltage Lockout Hysteresis 0.5 V SENSE COMPARATOR (VIN - VCSN) rising from 0V until VDRV < 0.5V (25 ) 215 220 225 Sense Voltage Threshold High V SNSHI (VIN - VCSN) rising from 0V until VDRV < 0.5V (-40 to +125 ) 210 220 230 mV (VIN - VCSN) falling from 0.26V until VDRV > (VCC - 0.5V) (25 ) 175 180 185 Sense Voltage Threshold Low V SNSLO (VIN - VCSN) falling from 0.26V until VDRV > (VCC - 0.5V) (-40 to +125 ) 170 180 190 mV Propagation Delay to Output High tDPDH Falling edge of (VIN - VCSN) from 0.26V to 0V to DRV high, CDRV = 1nF 82 ns Propagation Delay to Output Low t DPDL Rising edge of (VIN - VCSN) from 0V to 0.26V to DRV low, CDRV = 1nF 82 ns Current-Sense Input Current I CSN (VIN - VCSN) = 200mV 1 µA 40 50 mVCurrent-Sense Threshold Hysteresis CSHYS 40 60 mV к к к к к к 0.5V (25 )к 0.5V (-40 to +125 )к к

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 REV: 1.0 Many types of capacitors can be used for input bypassing, however, caution must be exercised when using multi- layer ceramic capacitors. Because of the self-resonant and high Q characteristics of some types of ceramic capaci- tors, high voltage transients can be generated under some start-up conditions, such as connecting the charger input to a live power source. Adding a 2.2 Ω resistor in series with an X5R ceramic capacitor will minimize start-up voltage transients. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GATE DRIVER Gate Driver Source Current V CSN = VIN, VDRV = 0.5 x VCC 0.5 A Gate Driver Sink Current V CSN = VIN - 250mV, VDRV = 0.5 x VCC 1A Gate Driver Output-Voltage High V OH IDRV = 10mA V CC - 0.5 V Gate Driver Output-Voltage Low V OL IDRV = -10mA 0.5 V DIM INPUT Maximum DIM Frequency f DIM 20 kHz DIM Input-Voltage High V IH VCSN = VIN, increase DIM until VDRV > (VCC - 0.5V) 2.8 V DIM Input-Voltage Low V IL VCSN = VIN, decrease DIM until VDRV < 0.5V 0.6 V DIM Hysteresis DIM HYS 200 mV DIM Turn-On Time t DIMON DIM rising edge to VDRV = 0.5 x VCC, CDRV = 1nF 100 ns DIM Turn-Off Time t DIMOFF DIM falling edge to VDRV = 0.5 x VCC, CDRV = 1nF 100 ns DIM Input Leakage High V DIM = VIN 10 µA DIM Input Leakage Low V DIM = 0V -1 +1 µA VCC REGULATOR Load Regulation I VCC = 0.1mA to 10mA, VIN = 12V 4 Ω Line Regulation V IN = 6V to 40V, IVCC = 10mA 11 mV Power-Supply Rejection Ratio PSRR V IN = 12V, IVCC = 5mA, fIN = 10kHz -35 dB VIN = 5.5V, VCC = 0V 45 mACurrent Limit I LIM VIN = 5.5V, VCC = 4V 18 mA Regulator Startup Time t STRAT VCC = 0 to 5.5V 350 us (VIN = 12V, V DIM = VCC, CVCC = 1µF, R SENSE = 0.51, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) Note 1: All devices are 100% production tested at TJ = +25°C and +125°C. Limits to -40°C are guaranteed by design. 6.0 Note 2: Vin Bypass Capacitor Layout suggestion VIN KB1365 L NMOS 1uF GND Rs 4 7uF 4 7uF22 R D LED+ LEDDIM 100uH (6V max)

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 REV: 1.0 (VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.51 connected between IN and CSN. Typical values at TA = +25°C, unless otherwise noted.) EFFICIENCY vs. VIN DRV SWITCHING FREQUENCY vs. VIN VIN (V) DRV SWITCHING FREQUENCY (kHz) 322620128 100 200 300 400 600 500 700 800 900 1000 1100 1200 1300 1400 1500 L = 47µH LED 5 LED 4 LED 3 LED 1 LED 2 LED CURRENT VARIATION vs. VIN VIN (V) LED CURRENT VARIATION FROM SET CURRENT (%) 302515 20 -1.5 -1.0 -0.5 1.0 0.5 1.5 2.0 -2.0 LED 5LED 4LED 3 LED 2LED 1 ILED(NOMINAL) = 400mA L = 100 µH VCC vs. VIN VIN (V) VCC (V) 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 4.5 5.0 40 ILED = 0 VCC vs. TEMPERATURE TEMPERATURE (°C) VCC (V) 1109565 80-10 5 20 35 50-25 5.31 5.32 5.33 5.34 5.35 5.36 5.37 5.38 5.39 5.40 5.30 -40 125 VIN = 24V VIN = 12V VDIM = 0V SUPPLY CURRENT vs. VIN VIN (V) SUPPLY CURRENT (µA) 350 400 450 500 4.5 40 VDIM = 0V PWM DIMMING AT 200Hz (10% DUTY CYCLE) 1ms/div VDIM 2V/div ILED 200mA/div VIN = 12V, L = 47µH,

1 LED

(90% DUTY CYCLE) 1ms/div VDIM 2V/div ILED 200mA/div VIN = 12V, L = 47µH, 1,3 and 7 LEDs L = 100/H9262H 100 01 0 2 0 3 0 4 0 Supply Voltage V IN (V) Efficiency (%)

3 Led

7 Led

TYPICAL PERFORMANCE CHARACTERISTICS 0 40 405

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 REV: 1.0 PWM DIMMING AT 20kHz (10% DUTY CYCLE) 10µs/div VDIM 2V/div ILED 200mA/div VIN = 24V, L = 47µH,

4 LEDS

(90% DUTY CYCLE) 10µs/div VDIM 2V/div ILED 200mA/div VIN = 24V, L = 33µH, (1% DUTY CYCLE) 10µs/div VDIM 2V/div ILED 200mA/div VIN = 12V, L = 47µH, (50% DUTY CYCLE) 1µs/div VDIM 2V/div ILED 200mA/div VIN = 24V, L = 33µH, (50% DUTY CYCLE) 4µs/div VDIM 2V/div ILED 200mA/div VIN = 12V, L = 47µH, ILED VARIATION vs. TEMPERATURE TEMPERATURE (°C) LED CURRENT VARIATION FROM SET CURRENT (%) 11095-25 -10 5 35 50 6520 80 -1.5 -1.0 -0.5 0.5 1.0 1.5 2.0 -2.0 -40 125 VIN = 24V VIN = 12V VDIM = 0V ILED(NOMINAL) = 400mA L = 100 µH (VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.51 connected between IN and CSN. Typical values at TA = +25°C, unless otherwise noted.) TYPICAL PERFORMANCE CHARACTERISTICS

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 The KB1365 are step-down, constant- current, high-brightness LED (HB LED) drivers. These devices operate from a 5.5V to 40V input voltage range and provide up to 0.5A of source and 1A of sink drive capability to the gate of an external MOSFET. A high- side current-sense resistor sets the output current and a dedicated PWM dimming input (DIM) allows for a wide range of independent pulsed dimming. The high-side current-sensing scheme and on-board current-setting circuitry minimize the number of exter- nal components while delivering LED current with a ±5% accuracy, using a 1% sense resistor. See the Functional Diagram. Undervoltage Lockout (UVLO) The KB1365 include a 5.0V undervoltage lockout (UVLO) with 500mV hysteresis. When V IN falls below 4.5V, DRV goes low, turning off the external n-chan- nel MOSFET. DRV goes high once V IN is 5V or higher. 5V Regulator VCC is the output of a 5V regulator capable of sourcing 10mA. Bypass VCC to GND with a 1µF capacitor. DIM Input The KB1365 allow dimming with a PWM signal at the DIM input. A logic level below 0.6V at DIM forces the KB1365’s DRV output low, turning off the LED current. To turn the LED current on, the logic level at DIM must be at least 2.8V. For the values of V SNSHI and VSNSLO, see the Electrical Characteristics. Current Regulator Operation The KB1365 regulate the LED output current using an input comparator with hysteresis (Figure 1). As the current through the inductor ramps up and the voltage across the sense resistor reaches the upper threshold, the voltage at DRV goes low, turn- ing off the external MOSFET. The MOSFET turns on again when the inductor current ramps down through the freewheeling diode until the voltage across the sense resistor equals the lower threshold. Use the fol- lowing equation to determine the operating frequency: where n = number of LEDs, V LED = forward voltage drop of one LED, and 6V = (VSNSHI - VSNSLO). f Vn V n V R VV LSW IN LED LED SENSE IN ××∆ REV: 1.0 Setting nominal average output current with external resistor RS The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (RS) connected between VIN and CSN and is given by: IOUTnom = 0.2/RS The table below gives values of nominal average output current for several preferred values of current setting resistor (RS) in the typical application circuit shown on page 1: RS (/H9024) Nominal average output current (mA) 0.1 2000 0.57 350 0.2 1000 Detailed Description Applications Information Inductor selection Recommended inductor values for the KB1365 are in the range 22/H9262H to 220/H9262H(100 H Typ.)./H9262 0.07 0.2 Rs Power w 0.4 Rs selection 0805:0.1R+0.1R

Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 PACAGE DESCRIPTION Kingbor Technology TEL:(86)0755-26508846 FAX:(86)0755-26509052 www.kingbor.com Small Outline SOT23-6 DIM Millimetres Inches DIM Millimetres Inches Min Max Min Max Min Max Min Max D 2.80 3.00 0.110 0.118 L 0° 10° 0° 10° PACKAGE DIMENSIONS CONTROLLING DIMENSIONS IN MILLIMETRES APPROX CONVERSIONS INCHES. DATUM Aa C E AA 2 D b e PACKAGE OUTLINE PAD LAYOUT DETAILS