BD9267KUT ROHM [Rohm], BD9267KUT Datasheet
BD9267KUT
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BD9267KUT Summary of contents
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... White LED Diver for Backlight of Medium/Large-sized LCDs BD9267KUT ● ● ● ● General Description BD9267KUT is a white LED diver used on backlight of Medium/Large-sized LCDs. This IC can achieve dimming function by SPI control. And through the SPI correspondence, it can set the ON/OFF of each switch, analog dimming and etc ...
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... LSP terminal input voltage The operating ranges above are acquired by evaluating the IC separately. Please take care when set the IC in applications. ● ● ● ● Block diagram 49 VREF5V 50 LSP 51 VCC 52 STB 53 GND 54 COMP2 55 COMP1 BD9267KUT 56 DGND CLK VSYNC 61 62 HSYNC 63 ERR_DET ...
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... BD9267KUT ●Electrical characteristics (unless otherwise specified 25° C, VCC = 12V, STB=3V) Item Symbol 【 【 【 【 Whole device】 】 】 】 Operating circuit Icc current Stand-by circuit IST current 【 【 【 【 VREF5V block】 】 】 】 ...
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... BD9267KUT ●Terminal No, name, and function Function No. Terminal No. CH1 NMOS gate terminal CH1 NMOS drain terminal CH1 NMOS source terminal CH2 NMOS gate terminal CH2 NMOS drain terminal CH2 NMOS source terminal CH3 NMOS gate 7 G3 ...
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... BD9267KUT ● ● ● ● Internal Equivalent Circuit Diagram G1～ ～ ～ ～ G16 VREF5V COMP1, COMP2 VSYNC, HSYNC www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 D1～ ～ ～ ～ D16 LSP VREF5V LSP 2MΩ 500kΩ ...
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... BD9267KUT ●Block Diagram VREF5V STB VCC REG GND DVDD DI FPGA CLK SPI I DGND register VSYNC (ON timming) PWM HSYNC DUTY (clock) CONTROL CS DI CLK 1/4 HSYNC VSYNC LED_OP_DET LED_SH_DET RES_SH_DET www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 DVDD ...
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... BD9267KUT ●Typical Performance Curves 400 350 300 250 200 150 100 VCC [V] Figure 7. Stand-by Current (IST) [µA] vs. VCC[V] 5.5 5.4 5.3 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4 VCC [V] Figure 9. VREF5V[V] vs. VCC[V] www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 Figure 8. Operating Current (Icc) [mA] vs. VCC[V] ...
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... BD9267KUT ●Pin Function Descriptions G1-G16 1,4,7,10,13,16,19,22,27,30,33,36,39,42,45,48PIN （ （ （ （ External FET gate driving terminal of LED constant current driver, operating range : 0～5V. S1-S16 3,6,9,12,15,18,21,24,25,28,31,34,37,40,43,46PIN （ （ （ （ Connect to external FET’s source terminal of LED constant current driver。Through the operations of constant current driver, all CHs of S1-S16 terminals are outputted the set voltages at addresses of 02h, 03h, and S1-S16 proceed the constant current operation ...
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... BD9267KUT LSP 50PIN （ （ （ （ ） ） ） ） A pin used for setting the LED SHORT protection detecting voltage. When LSP pin is in OPEN state, the voltage in inward typ.（Set it in range of 0.8V~3.0V） When LED is lighting, if the voltage of D1～16 pin is higher than 「 ...
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... BD9267KUT COMP2(54PIN) The COMP2 pin is used to feed back the state of voltage to the external power supply in order to optimize the power supply voltage for the LED layer. Positive feedback voltage is output to a pin having the lowest voltage out of the D9 to D16 pins. If the lowest voltage of the D9 to D16 pins is higher than 0 ...
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... BD9267KUT ●Functions of Logic Block Serial interface block This IC is controlled with the CS, CLK, DI, and DO serial interfaces. The following section describes data input format and timing. ◆WRITE MODE ・To write 1 byte of data CSS CLK t t DIS DIH ・ ...
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... BD9267KUT ◆READ MODE CS t CSS CLK t DIS t DIH Low DO DO_EN AC electrical characteristics: Parameter CLK cycle CLK high level range CLK low level range DI input setup time DI input hold time CS input setup time CS input hold time DO output delay time www.rohm.com © ...
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... BD9267KUT ◆ ◆ ◆ ◆ Register map（ （ （ （ 1/3） ） ） ） BIT7 Address R/W Default Register Name 00h FFh R/W LEDENA LEDEN[7] 01h FFh R/W LEDENB LEDEN[15] 02h 66h R/W LEDREFL LEDREF[7] 03h 02h R/W LEDREFM - 04h 02h R/W MASKSET - 05h 00h R ERRLEDOPA ...
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... BD9267KUT ◆ ◆ ◆ ◆ Register map（ （ （ （ 2/3） ） ） ） BIT7 Address R/W Default Register Name 00h 28h R/W DTYCNT12M - 00h 29h R/W DTYCNT13L DTY13[7] 00h 2Ah R/W DTYCNT13M - 00h 2Bh R/W DTYCNT14L DTY14[7] 00h 2Ch R/W DTYCNT14M - R/W 2Dh 00h DTYCNT15L DTY15[7] ...
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... BD9267KUT ◆ ◆ ◆ ◆ Register map （ （ （ （ 3/3） ） ） ） BIT7 Address R/W Default Register Name 00h 4Bh R/W DLYCNT14L DLY14[7] 00h 4Ch R/W DLYCNT14M - 00h 4Dh R/W DLYCNT15L DLY15[7] 00h 4Eh R/W DLYCNT15M - 00h 4Fh R/W DLYCNT16L DLY16[7] R/W 00h 50h DLYCNT16M - ◆ ...
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... BD9267KUT ●ADDR=04h MASKSET (Error signal output mask time setting register: Read/Write) Bit 7 6 Register - - Name Default - - Decoder ERRMSK[1] ERRMSK[ Note: Reg04h is synchronized with the leading edge of the VSYNC signal. Note: For counting values, a counter that counts one every four HSYNC signals is used. ...
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... BD9267KUT ●ADDR=0Bh ERRMOSSHA (LED1 to LED8 ERROR pin monitor: Read) Bit 7 6 Register ERRMOSSH_08 ERRMOSSH_07 Name 0 0 Default ●ADDR=0Ch ERRMOSSHB (LED9 to LED16 ERROR pin monitor: Read) Bit 7 6 Register ERRMOSSH_16 ERRMOSSH_15 Name 0 0 Default ERR ERR monitor 0 Normal ERROR １ ●ADDR=0Dh DUMMY (Dummy register: Read/Write) ...
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... BD9267KUT Decoder EAMPREFC EAMPREFB DAC output voltages to analog are converted with the decoders listed above. 0.3V: 0 4095 = 0F5h 0.4V: 0 4095 = 147h 0.5V: 0 4095 = 199h 0.6V: 0 4095 = 1EBh 0.8V: 0 4095 = 28Fh 1.0V: 1 4095 = 333h 1.2V: 1 4095 = 3F7h 1.5V: 1 4095 = 4CCh Note: Reg09h is synchronized with the leading edge of VSYNC signal. ...
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... BD9267KUT This register is used to make setting of pulse duty for PWM light modulation in a total of 12 bits, i.e., Bit7-0 when ADDR 11h and Bit3-0 when ADDR 12h. DTY01[11：0] “0000 0000 0000” “0000 0000 0001” “0000 0000 0010” “0000 0000 0011” ...
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... BD9267KUT ◆ ◆ ◆ ◆ Timing chart ●PWM Delay and ON Duty setting procedure VSYNC 0 HSYNC Delay 0 counter Duty counter PWM_OUT_01 By making register setting, PWM output delay and ON duty time counts of CH1 to CH16 can be controlled. The above timing chart shows an example for CH1. ...
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... BD9267KUT ● ERROR control There are the following four types of ERROR detection signals: (1) LED OPEN, (2) LED SHORT, (3) REGISTER SHORT, and (4) MOS SHORT The following section shows timing charts with the setting below: (Example) DLY01 ［ 11 ： 0 ］＝ 005 ｈ DTY01 ［ 11 ： 0 ］＝ 2FD ｈ ...
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... BD9267KUT ④ HSYNC HSYNC4I VSYNC PWM_OUT_01 RES_SH_DET_01 SSEND ERROR 3F pwm_mskcnt［5：0］ 3F err_mskcnt［5：0］ Enlarged chart L 拡大図 HSYNC HSYNC4I VSYNC PWM_OUT_01 RES_SH_DET_01 SSEND ERROR pwm_mskcnt［5：0］ err_mskcnt［5：0］ Enlarged chart M 拡大図 ...
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... Input the VSYNC, HSYNC signal which is for PWM dimming. ◆ ◆ ◆ ◆ PWM dimming mode, Boot sequence In BD9267KUT, as process mode, there is a test mode for running the LED driver, even there is no environment for SPI control. After inputting the power supply of VCC and DVDD, by setting the STB can be changed to PWM dimming operation mode achieved by duty control immediately ...
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... BD9267KUT PWM dimmingoperation mode ② ② ③ Figure 21. Starting Sequence for PWM dimming1 Settings of PWM dimming operation mode ・VSYNC=PWM dimming signal（Input the pulse signal for PWM dimming to VSYNC.） ・HSYNC=GND（Setting for abnormal detection） When you use the PWM dimming mode, please follow the sequence below. ...
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... BD9267KUT ◆ ◆ ◆ ◆ Condition for protections Protection Protection pin name LED OPEN Dx LEDSHORT Dx RES SHORT Sx MOSSHORT Sx VCC UVLO VCC ・ ・ ・ ・ LED_OPEN protection When PWMx=HIGH, If Drain pin becomes 0.1V(typ) or lower, ERR_DET = LOW is outputted and LED OPEN error will be detected ...
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... BD9267KUT ・ ・ ・ ・ RESISTOR SHORT protection ・ ・ ・ ・ MOSFET SHORT protection When PWMx=HIGH, if the voltage of Source pin becomes lower than 0.15V(typ), ERR_DET = LOW is outputted and RES SHORT error will be detected, and this error state is realeased when the voltage of Sourse pin comes back to 0.15V(typ) or higher ...
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... BD9267KUT ● ● ● ● Precautions in use 1.) This product is produced with strict quality control, but might be destroyed if used beyond its absolute maximum ratings including the range of applied voltage or operation temperature. Failure status such as short-circuit mode or open mode can not be estimated special mode beyond the absolute maximum ratings is estimated, physical safety countermeasures like fuse needs to be provided ...
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... BD9267KUT ● ● ● ● Ordering Information Product name ● ● ● ● Physical Dimension Tape and Reel Information TQFP64U 9.0 0.3 7.0 0 0.08 0.15 0.1 0.4 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Package Packaging and forming ...
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Precaution 1) Before you use our Products, you are requested to carefully read this document and fully understand its contents. ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use ...
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Mounting / Circuit board design 1) When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability principle, the reflow soldering method must be used; ...
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Precaution 1) The information contained in this document is provided on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible ...