iw7019 Product Brief 8-Channel LED Driver for LCD Panel Backlighting 1.0 Features 2.0 Description 3.0 Applications

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1.0 Features 8-channel LED driver, 85V (max) per channel 9V to 28V input supply voltage range Fully integrated high voltage current sink FETs with minimum external components Per channel current: up

1 1.0 Features 8-channel LED driver, 85V (max) per channel 9V to 28V input supply voltage range Fully integrated high voltage current sink FETs with minimum external components Per channel current: up to 200mA average current per string (2D), up to 450mA (3D) Patented BroadLED adaptive switch mode technology for high-current matching at maximum efficiency (1) Lowers cost for LED binning urrent matching accuracy ±2% Integrated D-D boost controller Dimming 10V gate drive voltage Programmable switching frequency: 100KHz to 200KHz Internal soft start to limit the inrush current 16-bit SPI for high bandwidth PWM dynamic local dimming or single direct PWM input with phase shift - PWM dimming range from 0% to 99.9% (or 100% for SPI mode) - Fully synchronized PWM to VSYN using PLL 8-bit analog dimming omprehensive protection features LED failure (open and short-circuit) detection Single-pin and resistor-programmable LED short level (3V/6V/9V/12V) fault detection Over-temperature shutdown Boost controller output OP, OVP, and UV protection Packaging Boost input UVLO protection TQFP-44, EP, 10mm x 10mm, 0.8mm pitch, up to 230mA/channel SOP-32, Non-EP, 10.4mm x 20.74mm, 1.27mm pitch, up to 175mA/channel Pin-out optimized for single-layer PB layout (1) US patent number: Description The iw7019 is a high efficiency driver for LEDs. It integrates one internal step-up PWM D-D converter to drive up to 8 separate strings of multiple series-connected LEDs. Users can provide versatile configurations of the iw7019 through the SPI interface registers. The iw7019 can maintain very high efficiency by compensating for LED forward voltage mismatch using iwatt s proprietary digital power management and patented BroadLED TM adaptive switch mode LED current regulation technologies. With the flexible PWM dimming control, the iw7019 improves the picture quality of TVs, by reducing motion blur and waterfall noise. The high resolution of 12-bit local dimming increases the contrast ratio. The iw7019 has multiple features to protect the LED channels from fault conditions. These protections are executed on a cycle-by-cycle basis to ensure system reliability and provide consistent operation. 3.0 Applications Direct and segment-edge LED backlit LD TVs Edge-type global dimming LED backlit LD TVs 3D patterned retarder (PR) TVs 3D shutter glass (SG) TVs + SB SK MOSI MISO EN FAULTB VSYN/PWM 3 Vin 3 4 R5 R6 VIN DPGND RT UVLO AVSS LDO5_D LDO5_A SB SK MOSI MISO EN FAULTB VSYN/PWM VREF2P5 ISET/ADIM PLL RLS iw7019 GORV S VFB UNUSE VOMP LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 L R4 R 2 Q 1 D Vout + LED LED LED LED LED LED LED LED Figure 3.1 : iw7019 Application Diagram Rev. 0.2 iw7019 Page 1

2 4.0 Pinout Description LED5 N LED4 N LED3 LED2 LED1 UNUSE AVSS N 1 33 PLL LED ADIM/ISET N 3 31 MISO LED MOSI 5 6 iw7019 (TQFP44) LED VREF2P5 N 8 26 VSYN/PWM VFB 9 25 EN DPGND FAULTB S SK GDRV VOMP RT UVLO LDO5_A LDO5_D RLS VIN SB Figure 4.1 : Pin onfiguration for TQFP44 Package VSYN/PWM 1 32 EN VREF2P FAULTB MOSI 3 30 SK MISO 4 29 SB ADIM/ISET 5 28 VIN PLL 6 AVSS 7 UNUSE 8 iw7019 (SOP32) RLS LDO5_D LDO5_A LED UVLO LED RT LED VOMP LED GDRV LED S LED DPGND LED VFB LED Figure 4.2 : Pin onfiguration for SOP32 Package Rev. 0.2 iw7019 Page 2

3 Pin # TQFP44 Pin # SOP32 1 X N Name Type Pin Description 2 14 LED6 Analog Output LED cathode connection for string 6 3 XX N 4 15 LED7 Analog Output LED cathode connection for string Ground Ground for LED driver 6 17 Ground Ground for LED driver 7 16 LED8 Analog Output LED cathode connection for string 8 8 X N 9 18 VFB Analog Input Boost controller feedback pin (1.2V settled value) DPGND Digital Ground Digital ground and boost pre-driver ground S Analog In/Out Boost pre-driver sense input GDRV Analog Output Boost gate drive for external MOSFET VOMP Analog Input Boost controller loop compensation RT Analog Input Programmable boost switching frequency (100K/150K/200K) UVLO Analog Input Boost UVLO comparator input. Voltage level is greater than 1.2V for a healthy boost VIN. ustomer has to put resistor divider on LDO5_A Analog Output Internal LDO output and analog power section supply Ground Ground for LED driver Ground Ground for LED driver LDO5_D Analog Output Internal LDO output and digital power section supply RLS Analog Input Short level threshold voltage setting (3/6/9V/12V, with default at 6V), using different resistor selection VIN Supply Input Input voltage to the main supply rail SB Digital Input Slave select input for SPI (hip Select Bar). Active LOW. Logic high is defined as 5.0V SK Digital Input SK, serial clock input for Serial Peripheral Interface (SPI). Logic high is defined as 5.0V FAULTB Analog Output Fault status (Active Low) - Open drain. Pull-up to LDO5A with a 100KΩ +5% resistor EN Digital Input Enable Input. Logic high is defined as 5.0V 26 1 VSYN/ PWM Digital Input Vertical SYN input. [optional direct PWM control]. Logic high is defined as 5.0V 27 2 VREF2P5 Analog Output Analog reference for analog dimming Ground Ground for LED driver Ground Ground for LED driver 30 3 MOSI Digital Input Master output and slave input for SPI. Logic high is defined as 5.0V Rev. 0.2 iw7019 Page 3

4 Pin # TQFP44 Pin # SOP32 Name Type Pin Description 31 4 MISO Digital Input Master input and slave output for SPI. Logic high is defined as 5.0V 32 5 ADIM/ ISET Analog Input Dedicate current setting/analog dimming input 33 6 PLL Analog In/Out PLL compensation output / External lock In 34 7 AVSS Analog Output Quiet analog ground 35 8 UNUSE Ground Set unused channel number 36 9 LED1 Ground LED cathode connection for string LED2 Analog Output LED cathode connection for string Ground Ground for LED driver Ground Ground for LED driver LED3 Analog Output LED cathode connection for string 3 41 X N Analog In/Out LED4 Analog Output LED cathode connection for string 4 43 X N Analog Input LED5 Analog Input LED cathode connection for string 5 EP EXPGND Ground Exposed PAD for LED driver for TQFP44 only Rev. 0.2 iw7019 Page 4

5 5.0 Absolute Maximum Ratings Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. For maximum safe operating conditions, refer to iw7019 datasheet for more information. Parameter Symbol Value Unit V IN supply voltage V IN -0.3 to 40 V LDO5 output voltage V LDO5-0.3 to 7 V AGND/AVSS/GNDn to GND V Dx -0.3 to 0.3 V LEDn voltage V LDOn -0.3 to 85 V Logic I/O pins (SK, MISO, MOSI, SB, and VSYN) -0.3 to 7 V Voltage on all other pins except for LEDn pins -0.3 to 7 V Power dissipation at TA 25 P D TBD mw Maximum operating junction temperature T JMAX -40 to 150 Storage temperature T STG -40 to 150 Latch-up current >100 ma ESD rating per JEDE JESD22-A114 - HBM ±2,000 V 6.0 Recommended Operating onditions Parameter Min Typ Max Unit V IN supply voltage (V IN ) 9 28 V LEDn voltage V Thermal Resistance Junction (θ JA ) TBD /W Junction Temperature (T J ) Operating Temperature () Rev. 0.2 iw7019 Page 5

6 7.0 Physical Dimensions Figure 7.1 : Physical Dimensions for TQFP-44 Package Rev. 0.2 iw7019 Page 6

7 Figure 7.1 : Physical Dimensions for SOP-32 Package 8.0 Ordering Information Part Number Options Package Description iw so32 TQFP-10mm 44L-EP Tape & Reel 1 iw tq2e SOP Tube 2 Note 1: Tape & Reel packing quantity is 1,600/reel. Minimum ordering quantity is 1,600. Note 2: Tube packing quantity is 1,200/carton. Minimum ordering quantity is 1,200. Rev. 0.2 iw7019 Page 7

8 Trademark Information 2014 iwatt Inc. All rights reserved. iwatt, the iwatt logo, BroadLED, EZ-EMI, Flickerless, and PrimAccurate are registered trademarks and AccuSwitch and Power Management Simplified Digitally are trademarks of iwatt Inc. All other trademarks are the property of their respective owners. ontact Information Web: Phone: +1 (408) Fax: +1 (408) iwatt Inc. 675 ampbell Technology Parkway, Suite 150 ampbell, A Disclaimer and Legal Notices iwatt reserves the right to make changes to its products and to discontinue products without notice. The applications information, schematic diagrams, and other reference information included herein is provided as a design aid only and are therefore provided as-is. iwatt makes no warranties with respect to this information and disclaims any implied warranties of merchantability or non-infringement of third-party intellectual property rights. ertain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage ( ritical Applications ). iwatt SEMIONDUTOR PRODUTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE SUPPORT APPLIATIONS, DEVIES OR SYSTEMS, OR OTHER RITIAL APPLIATIONS. Inclusion of iwatt products in critical applications is understood to be fully at the risk of the customer. Questions concerning potential risk applications should be directed to iwatt Inc. iwatt semiconductors are typically used in power supplies in which high voltages are present during operation. High-voltage safety precautions should be observed in design and operation to minimize the chance of injury. Rev. 0.2 iw7019 Page 8

iw3623 Product Brief AC/DC Digital Power Controller for High Power Factor LED Drivers 1.0 Features 2.0 Description 3.

iw3623 Product Brief AC/DC Digital Power Controller for High Power Factor LED Drivers 1.0 Features 2.0 Description 3. 1.0 Features Isolated AC/DC off-line LED driver Power factor > 0.95 for wide input voltage range 100 277V AC Total harmonic distortion (THD) < 10% Under 5% 100Hz/120Hz output current ripple Resonant control