FP7182XR-G1

FP7182 LED Driver with Average-Mode Constant Current Control General Description The FP7182 is an average current mode control LED driver IC operating in a constant off-time mode. FP7182 does not produce a peak-to-average error, and therefore greatly improves accuracy, line and load regulation of the LED current without any need for loop compensation or high-side current sensing. The output LED current accuracy is ±2%. The FP7182 can be powered from an 8.0 - 100V supply. A PWM & linear dimming input is provided that accepts an external control TTL compatible signal. The output current can be programmed by an internal 250mV reference. or controlled externally through a 0.2 – 1.5V dimming input. Features  Fast Average Current Control  Internal 8 to 100V Linear Regulator  Linear and PWM Dimming Capability  Output Short Circuit Protection with Skip Mode  Requires Few External Components for Operation  Internal 100V/6A N-MOSFET Applications  DC/DC or AC/DC LED Driver Applications  Back Lighting of Flat Panel Displays  General Purpose Constant Current Source  Signage and Decorative LED Lighting  Chargers Typical Application Circuit VIN Up to 100V VIN GND DIM GND LED PWM and Linear Dimming VDD LX CS LX FP7182 This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 1/12 FP7182 Function Block Diagram VIN Regulator Internal supply UVLO POR VDD LX Average Current Logic Control DIM 200mV/250mV 100V N-MOS DIM to CS ratio = 0.167 LEB OTP GND TOFF Timer SCP CS 550mV Pin Descriptions SOP-8L(EP) Top View Name No. I / O Description 1 8 GND VIN 1 I DIM 2 7 GND DIM 2 I VDD 3 6 LX VDD 3 I CS 4 5 LX CS 4 I LX 5 O LX 6 O Power switch GND 7 P Ground return for all internal circuitry. GND 8 P Ground return for all internal circuitry. EP 9 O Exposed PAD. Must connect to LX. FP7182 XXx-XXL VIN This pin is the input of an 8 - 100V linear regulator. This pin is the linear and PWM dimming input of the IC. This is the power supply pin for all internal circuits. This pin is the current sense pin used to sense the FET current by means of an external sense resistor. Power switch Bottom View EP(LX) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 2/12 FP7182 Marking Information FP7182 XXx - XXL Halogen Free Lot Number Internal ID Per - Half Month Year Halogen Free: Halogen free product indicator Lot Number: Wafer lot number’s last two digits For Example Lot : 123456 XXx-56L Internal ID: Internal Identification Code Per-Half Month: Production period indicator in half month time unit For Example : A → First Half Month of January B → Second Half Month of January C → First Half Month of February D → Second Half Month of February Year: Production year’s last digit This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 3/12 FP7182 Ordering Information Part Number Ambient Operating Junction Operating Package Temperature Temperature FP7182XR-G1 -25°C ~ +85°C -25°C ~ +125°C SOP-8L(EP) Conditions Min. MOQ Description 2500 EA Tape & Reel Absolute Maximum Ratings Parameter Symbol Power Supply Voltage Unit VIN to GND 100 V VDD VDD to GND 8.5 V VDD-0.3V V -0.3 Internal MOS VDS Breakdown Voltage VDS Allowable Power Dissipation PD Junction to Ambient Thermal Resistance θJA 100 TS V SOP-8L(EP) TA≦+25°C 630 128 Operating Temperature SOP-8L Lead Temperature Max. VIN CS, DIM Storage Temperature Typ. SOP-8L(EP) (soldering, 10 sec) mW °C / W -25 +85 °C -40 +150 °C +260 °C IR Re-flow Soldering Curve This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 4/12 FP7182 Recommended Operating Conditions Max. Unit 8.5 100 V Ambient Operating Temperature -25 +85 °C Junction Operating Temperature -25 +125 °C Parameter Symbol Supply Voltage Conditions VIN Min. Typ. DC Electrical Characteristics (VIN=12V,TA = 25°C, unless otherwise noted) Parameter Symbol Conditions Min. Typ. Max. Unit VDD VIN = 8V, IDD(ext)= 0, 500pF at GATE; DIM= VDD 7.25 7.5 7.75 V - 1.0 V 100 mV Internal Regulator Internally regulated voltage Line regulation of VDD ΔVDD,line VIN = 8 – 100V, IDD(ext)=0 0 Load regulation of VDD ΔVDD,load IDD(ext) = 0 – 0.6mA, DIM = VDD 0 VDD undervoltage lockout threshold VDD undervoltage lockout hysteresis UVLO VDD rising 6.3 V ΔUVLO VDD falling 500 mV PWM Dimming Pin DIM input low voltage VEN(lo) VIN = 8 - 100V Pin DIM input high voltage VEN(hi) VIN = 8 - 100V 0.1 1.6 V V Average Current Sense Logic Current sense reference voltage DIM-to-CS voltage ratio VCS 243 250 257 AV(DIM) 0.164 0.167 0.17 AVDIM DIM-to-CS voltage offset (OFFSET) Offset = VCS – AV(DIM)‧VDIM VDIM=1.2V 0 CS threshold temp regulation mV 10 mV 5 mV DIM input voltage, shutdown VDIM(OFF) 200 mV DIM input voltage, enable △ VDIM(ON) 250 mV Current sense blanking interval TBLANK 150 Minimum steady-state duty cycle TON(min) CS=VCS + 30mV 350 ns 1000 ns 605 mV 150 ns 650 us 600 ns Short Circuit Protection Hiccup threshold voltage VCS 495 Current limit delay CS – GATE TDELAY Short circuit hiccup time THICCUP Minimum on-time (short circuit) TON(min) CS=VDD 550 CS=VCS + 30mV 450 550 Notes: # Guaranteed by design This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 5/12 FP7182 Parameter Symbol Conditions Min. Typ. Max. Unit TOFF Timer Minimum off time TOFF(MIM) 0.6 us Maximum off time TOFF(MAX) 50 us Maximum on time TON(MAX) 60 us Thermal protection 130 °C Thermal shutdown 150 °C Thermal Protection Internal MOSFET Drain-Source Breakdown Voltage Drain-Source Leakage Current Static Drain-Source 2 On-Resistance Notes: TOFF = BVDSS IDSS RDS(ON) VGS=0V, ID=250uA VDS=80V, VGS=0V,TJ=25℃ ID=1A 100 V 1 uA 100 mΩ 0.6 × L × ILED( AVG ) VLED(MAX ) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 6/12 FP7182 Function Description Input Voltage Regulator The FP7182 can be powered directly from its VIN pin and can work from 8.5 - 100VDC at its VIN pin. When a voltage is applied at the VIN pin, the FP7182 maintains a constant 7.5V at the VDD pin. This voltage is used to power the IC and any external resistor dividers needed to control the IC. The VDD pin must be bypassed by a low ESR capacitor to provide a low impedance path for the high frequency current of the internal driver. The FP7182 can also be operated by supplying a voltage at the VDD pin greater than the internally regulated voltage. This will turn off the internal linear regulator of the IC and the FP7182 will operate directly off the voltage supplied at the VDD pin. Please note that this external voltage at the VDD pin should not exceed 8.5V. Average Current Control The LED current is detected using a sense resistor at the CS pin. The feedback operates in a fast open-loop mode. No compensation is required. When the voltage at the DIM input VDIM ≥ 1.5V, output current is programmed simply as: ILED ( A )= 0.25 V R CS (Ω) Otherwise: ILED ( A )= VDIM ( V ) × 0.167 R CS (Ω) LED Current CS Average Current = 0.25V RCS 0.25V t t The above equations are only valid for continuous conduction of the output inductor. It is a good practice to design the inductor such that the switching ripple current in it is 25% of its average peak-to-peak, full load, DC current. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 7/12 FP7182 Output Short Circuit Protection The short circuit protection comparator trips when the voltage at CS exceeds 0.55V. When this occurs, the GATE off-time THICCUP = 550μs is generated to prevent stair-casing of the inductor current and potentially its saturation due to insufficient output voltage. ILED 550mV RCS VCS 550mV t 550us(Typ.) Linear Dimming When the voltage at DIM falls below 1.5V, the internal 250mV reference to the constant-current feedback becomes overridden by VDIM • 0.185. As long as the current in the inductor remains continuous, the LED current is given by the equation above. However, when V DIM falls below 200mV, the internal MOSFET output becomes disabled. The internal MOSFET signal recovers, when VDIM exceeds 250mV. This is required in some applications to be able to shut the LED lamp off with the same signal input that controls the brightness. LED Current 100% 80% 60% 40% 20% 0% 0.3 0.6 0.9 1.2 1.5 DIM(V) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 8/12 FP7182 PWM Dimming Due to the fast open-loop response of the average-current control loop of the FP7182, its PWM dimming performance nearly matches that of the FP7171. V LED Current PWM Dimming GATE t The rising and falling edges are limited by the current slew rate in the inductor. The first switching cycle is terminated upon reaching the 250mV (VDIM • 0.167) level at CS. The circuit is further reaching its steady-state within 1 switching cycles regardless of the switching frequency. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 9/12 FP7182 Suggested Layout LED- GND VIA to VIN C2 GND VIN FP7182 DIM C1 R1 GND VDD LX CS LX VIN L1 D1 LED+ This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 10/12 FP7182 Typical Application Circuit VIN Up to 100V GND VIN C1 10uF/120V PWM and Linear Dimming D1 BX310F DIM GND VDD C2 0.47uF VLED=3V~90V ILED=3A LX L1 47uH CS LX FP7182 R1 0.083 This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 11/12 FP7182 Package Outline SOP-8L (EP) UNIT: mm Symbols Min. (mm) Max. (mm) A 1.30 1.70 A1 0 0.15 A2 1.25 1.55 D 4.70 5.10 E 3.80 4.00 H 5.80 6.20 L 0.40 1.27 Symbols Min. (mm) Max. (mm) D1 2.60 3.45 E1 1.90 2.56 Exposed PAD Dimensions: Note: 1. Package dimensions are in compliance with JEDEC outline: MS-012 AA. 2. Dimension ”D” does not include molding flash, protrusions or gate burrs. 3. Dimension “E” does not include inter-lead flash or protrusions. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.66 12/12