bd9202efs ROHM Co. Ltd., bd9202efs Datasheet
bd9202efs
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bd9202efs Summary of contents
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... BD9202EFS ●Description BD9202EFS is the LED driver IC which loads the step-up DCDC controller and the constant electric current driver of 8ch. As for the constant electric current driver, PWM modulated light of 10bit gradation (1024stages) is possible with the register setting from 4 line serial interfaces. ...
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... BD9202EFS ●Operating condition (Ta=25℃) Parameter Power supply voltage CT oscillation frequency setting range CT_SYNC_IN input frequency range *4*5 BCT oscillation frequency setting range BCT_SYNC_IN input frequency range *4*5 VSET Input potential *4 When not using external frequency input, please connect the terminal of CT_SYNC_IN, BCT_SYNC_IN to GND. ...
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... BD9202EFS Parameter 【LOADSW section】 LOADSW ON value of resistance 【Filter(CP1,CP2) section】 CP Detection voltage CP Charging current 【LED output (LED1～8) section】 LED Electric current absolute variation ISET Clamp voltage Open detection voltage Short detection voltage 【 】 Logic input(EN,CPUCS,CPUCLK,CPUDI) Input High voltage ...
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... BD9202EFS ●Pin configuration ●Terminal number， terminal name Terminal PIN name Function No. (1) LED1 LED output terminal1 (2) PGND2 GND2 for LED (3) LED2 LED output terminal2 Condenser connected terminal for filter (4) CP1 setting 1 Condenser connected terminal for filter ...
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... BD9202EFS ●The reference data (Unless otherwise specified VCC=24V and Ta=25 ℃) 5.5 VCC=24V, Io=0mA 5.3 5.1 4.9 4.7 4.5 -40 - [℃] Fig.1 VREG Temperature characteristic 100 80 60 VCC=24V, RSET=68kΩ 0.0 0.5 1.0 1.5 2.0 2.5 3.0 VLED [V] Fig.4 ILED depending on VLED 1.0 0.9 VCC=24V 0.8 0.7 0.6 0.5 -40 - [℃] Fig.7 VLED Temperature characteristic 5.0 4.5 4.0 3.5 3.0 -40 -15 ...
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... BD9202EFS ●Functional explanation ○ VREG The fixed voltage generated from VCC. It starts when it becomes EN=H. UVLO (Under Voltage LOCK Out) is built in by VREG, When it is below 2.9V (typ)，the internal circuit stops. When it is above 3.0V (typ), the internal circuit operation starts. Please connect Creg=2.2 μ the VREG terminal capacity for phase compensation. ...
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... BD9202EFS ○ Serial interface section This IC is controlled by 4 line serial interfaces of CPUCLK, CPUCS,CPUDI and CPUDO. The data entry format and timing are shown below. In the case of WRITE CPUCS t CSS CPUCLK DIS DIH CPUDI CPUDO In the case of READ ...
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... BD9202EFS Register map Addres Initial Register R/W Bit7 Bit6 s value name PWMRS - 00H R/W 00h PWMCNT T 01H R/W 00h LEDEN LED8EN LED7EN SETPWM1 PWM PWM 02H R/W 00h 1 LED1[7] LED1[6] SETPWM - - 03H R/W 00h 12 SETPWM PWM PWM 04H R/W 00h 21 LED2[7] LED2[6] SETPWM - - 05H R/W 00h 22 SETPWM PWM ...
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... BD9202EFS ●ADDR=01h LEDEN(LED ON/OFF Control register : Read/Write) Bit 7 6 Register LED8EN LED7EN name Initial value 0 0 LED1(～8) When doing PWM modulated light with PWMEN of ADDR=00h, if LED1 of ADDR=01h ( designated becomes regular ON. (LED1 (8) EN takes precedence.) So after that, if LED1 ( designated returns to the PWM modulated light that is set at beginning. ● ...
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... The method connected control wire when plural IC is used Connected method of the control wire when plural BD9202EFS is controlled with one CPU is shown. You connect CPUCLK and CPUDI in parallel (note the ability of respective drive), CPUCS wires in each BD9202EFS. CPU DATA ...
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... BD9202EFS ○Booster DC/DC Controller ・ LED Series Numeric It detects the LED cathode voltage, or the LED voltage, and controls the output voltage to be 0.75 (Typ.). The booster only operates when the LED output is operating. When multiple LED outputs are operating, the LED VF controls the LED output of the highest line ...
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... BD9202EFS 【Protection Functions】 Protection Function UVLO (VREG) UVLO (EXT) TSD OVP OCP LED open detection LED short detection To clear the latch type, the logic section must be reset. Protection Function UVLO (VREG) UVLO (EXT) TSD OVP OCP LED open detection *1 LED short detection *1 *1 LED open and short detection is only valid with operating channels, and all CH turn to OFF when 1-ch error is detected ...
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... BD9202EFS 3. Selection of Input Condenser (Cin) VCC Cin VOUT CO 4. Selection of MOSFET for Load Switch, and its Soft Start Because there are no switches on the route between the VCC and the VO with regular boost applications, in case of an output short circuit the coil or rectification diode may be damaged. To prevent this from happening, a PMOSFET load switch should inserted between the VCC and the coil ...
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... BD9202EFS ●Electricity Consumption Calculations Pc(N)=ICC*VCC+2*Ciss*VREG*Fsw*Vcc*[VLED*N+ΔVf*(N-1)]*ILED ：Maximum circuit current ICC ：Power voltage VCC ：External FET capacity Ciss ：SW gate voltage Vsw ：SW frequency Fsw ：LOAD SW ON resistance Rload ：LOAD SW maximum inflowing current Iload ：LED control voltage VLED ：LED parallel numeric N Δ ...
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... BD9202EFS ●External Parts for PCB Board Name Type Connector For SPI/IF For LED Board I/F For Power Supply Ceramic - 27pF 1000pF 10uF 2.2uF 1uF - Tantal 220uF Resistance 5.1kΩ - 51mΩ 100Ω 300Ω 10kΩ 20kΩ 51kΩ 68kΩ ...
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... BD9202EFS ●In/Output Equivalent Circuit 1 1.LED1 , 3.LED2 , 20.LED3 , 22.LED4 , 23.LED5 , 25.LED6 , 42.LED7 , 44.LED8 LED1～8 100k 5k 9.CPUDI ,12.CPUCLK , 13.CPUCS CPUVDD CPUVDD www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 4.CP1 , 5.CP2 VREG OVP 3k 100 10.CPUDO CPUVDD CPUVDD CPUDO VREG 16/19 Technical Note 6 ...
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... BD9202EFS ●In/Output Equivalent Circuit 2 16.VREF VREG CL7V VREF 800k 19.TEST CL7V TEST 30k 20k 29.CS CL7V CS 100 5k 5P 33.LOADSW LOADSW 40.TOUT2 VREG 2k TOUT2 50 100k www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 17.ISET CL7V ISET 500 26.TOUT1 , 35.CT_SYNC_OUT , 36.BCT_SYNC_OUT VREG VREG 30 ...
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... BD9202EFS ●Usage Notes 1.) Absolute Maximum Ratings Although the quality of this product has been tightly controlled, deterioration or even destruction may occur if the absolute maximum ratings, such as for applied pressure and operational temperature range, are exceeded. Furthermore, we are unable to assume short or open mode destruction conditions. If special modes, which exceed the absolute maximum ratings, are expected, physical safely precautions such as fuses should be considered ...
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... BD9202EFS Selecting a Model Name When Ordering ROHM model name Part number HTSSOP-A44 <Dimension> 18.5 ± 0.1 (MAX 18.85 include BURR) (6. 0. 1PIN MARK 0.17 S 0.08 S +0.05 0.8 0.37 0.08 M -0.04 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved Package type EFS = HTSSOP <Tape and Reel information> ...
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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 ...