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| 1/4 STRUCTURE PRODUCT TYPE FEATURE Silicon Monolithic Integrated Circuit White LED Driver for LCD Backlights with step-up DC/DC controller BD9203EFV 6CH LED current driver up to 150mA/CH built-in *2 Over voltage protection (OVP), Short circuit protection (SCP), LED open and short detection Step-up DC/DC controller built-in PWM and DC Dimming Programmable timer latch and soft-start period by external capacitor Over voltage protection (OVP), Short current protection (SCP), LED open and short detection Under voltage lock out (UVLO) HTSSOP-B28 package ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage STB Voltage LED Output Voltage FAIL Output Voltage Pin Voltage Power Dissipation Operating Temperature Range Storage Temperature Range LED Maximum Current (Ta=25) Symbol VCC VREF5V STB LED16 FAIL SEL, UVLO, PWM1, PWM2, RT, SS, SLOPE, ISET, VREF, CP, FB, OVP, CS N Pd Topr Tstg ILED Limit 36 7 36 40 40 7 15 3.30 *1 -40+85 -55+150 150 *2 Unit V V V V V V V W mA *1 Pd derated at 26.4 mW/ for temperature above Ta=25, mounted on 70mmx70mmx1.6mm 2 layer(cupper area 70mmx70mm)glass-epoxy PCB. *2 This is the constant current value per 1ch. Please perform setting of the constant current value in the range that is not beyond a value of Pd. This product is not designed for protection against radioactive rays. OPERATING CONDITIONS (Ta=25) PARAMETER Power Supply Voltage CT Oscillation Frequency Range VREF input voltage range Symbol VCC FCT VREF Limit 935 1001000 0VREF5V Unit V kHz V REV. 2/4 ELECTRICAL CHARACTERISTICS(unless otherwise specified VCC=24V, Ta=25) PARAMETER Total Current Consumption Circuit Current Standby Current VREF5V VREF5V Voltage VREF5V source current Switching block N source resistance N sink resistance SOFT START SS source current SS END pin voltage Error-Amp block LED control voltage FB sink current FB source current CT Oscillator block Oscillation Frequency RT pin output voltage SLOPE pin output voltage MAX DUTY OVP Over Voltage Protection voltage OVP hysterisis OVP Feedback Voltage SCP Short Circuit Protection voltage UVLO Operating voltage (VCC) hysterisis (VCC) Cancel voltage (UVLO) hysterisis (UVLO) FILTER(CP) CP detection voltage CP source current LED output (LED16) LED current accuracy Open detection voltage Short detection voltage STB Input High voltage Input Low voltage Input current PWM1, PWM2 Input High voltage Input Low voltage Input current FAIL output(open drain) FAIL Low voltage VOL 0.05 0.10 0.20 V IOL=1mA PWMH PWML IPWM 2.0 -0.3 -5 0 5.0 0.5 5 V V uA VIN=5V(PWM1, PWM2) STBH STBL IEN 2.0 -0.3 13 25 VCC 0.8 38 V V uA VIN=5V(STB) VCP ICP ILED VOPEN VSHORT 1.8 -2.0 -3 0.05 4.5 2.0 -1.0 0.20 5.0 2.2 -0.5 3 0.35 5.5 V uA % V V CP=SWEEP UP VCP=0V ILED=40mA VLED=SWEEP DOWN VLED=SWEEP UP VUVLO_VCC VUHYS_VCC VUVLO_U VUHYS_U 6.0 150 2.375 50 7.0 300 2.5 100 8.0 600 2.625 200 V mV V mV VCC=SWEEP UP VCC=SWEEP DOWN UVLO=SWEEP UP UVLO=SWEEP DOWN VSCP 0.05 0.20 0.35 V VOVP=SWEEP DOWN VOVP VOVPHYS FBOVP 3.8 100 3.5 4.0 200 3.6 4.2 400 3.7 V mV V VOVP=SWEEP UP VOVP=SWEEP DOWN PWM1, 2=0V FCT VRT VSLOPE DMAX 500 1.05 1.05 76 600 1.5 1.5 85 700 1.95 1.95 94 kHz V V % RT=100k RONH RONL ISS VSS VLED IFBSINK IFBSOURCE -2.0 3.8 0.65 40 -200 7 3.4 -1.0 4.0 0.75 100 -100 14 7 -0.5 4.2 0.85 200 -40 ION=-10mA ION=10mA VREF5 IREF5 4.9 20 5.0 5.1 V V IO=0mA ICC IST 5 0 10 10 mA uA STB=3V, LED16=ON, RT=100k STB=0V Symbol MIN. Limit TYP. MAX. UNIT Conditions uA V V uA uA LED=2.0V, VFB=1.0V LED=0V, VFB=1.0V SS=SWEEP UP (This product is not designed for protection against radioactive rays.) REV. 3/4 BLOCK DIAGRAM VIN CIN CVREF VREF5V VCC CVCC STB SLOPE VREG PWM COMP + UVLO OSDET UVLO (VCC) UVLO + COUT VCC TSD OVP FILTER OVP CP CP FAIL + RT OSC Driver Control Logic Durrent Sence N SS CS AGND FB RPC CPC ERR AMP + PGND3 Current driver SEL PWM1 PWM2 LED1 LED2 LED3 LED4 LED5 LED6 PACKEGE, MARKING SPECIFICATION VREF ISET ISET PGND1 PGND2 Open-Short Detect BD9203EFV OSDET LOT No. HTSSOP-B28 PIN No. & PIN NAME PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN Name PGND3 N SEL FAIL UVLO PWM2 PWM1 VCC STB VREF5V AGND RT SLOPE ISET Function Power GND DC/DC switching output Active LED channel select pin (3 state) Protect signal output Under voltage lock out input External PWM input 2 External PWM input 1 Power Supply Voltage Enable pin Internal regulator output Analog GND CT frequency setting R Slope compensation setting R LED output current setting R PIN No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 PIN Name VREF CP FB PGND1 LED1 LED2 LED3 LED4 LED5 LED6 PGND2 SS OVP CS Function DC dimming input Filter set Cap. Error amp output LED output GND1 LED output 1 LED output 2 LED output 3 LED output 4 LED output 5 LED output 6 LED output GND2 Soft start period setting Cap. DC/DC over voltage protection DC/DC current sense REV. 4/4 Operation Notes 1) Absolute maximum ratings An excess in the absolute maximum rating, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) GND voltage The potential of GND pin must be minimum potential in all condition. As an exception, the circuit design allows voltages up to -0.3 V to be applied to the ICT pin. 3) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. 4) Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 5) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 6) Mutual impedance Power supply and ground wiring should reflect consideration of the need to lower mutual impedance and minimize ripple as much as possible (by making wiring as short and thick as possible or rejecting ripple by incorporating inductance and capacitance). 7) Regarding input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, as shown in the figures below, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Although the circuit design allows voltages up to -0.3 V to be applied to the ICT pin, voltages lower than this may cause the behavior described above. Use caution when designing the circuit. (Pin B) Resistor (Pin A) P+ P N + B C Transistor (NPN) N P N P substrate E GND P + P N P substrate GND P + N N N Parasitic elements GND Parasitic elements (Pin A) (Pin B) Parasitic elements Other Adjacent Elements Simplified structure of a Monolithic IC B C E GND Parasitic elements GND REV. Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com (c) 2010 ROHM Co., Ltd. All rights reserved. R1010A |
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