1/4 STRUCTURE Silicon Monolithic Integrated Circuit NAME OF PRODUCT DC-AC Inverter Control IC TYPE ＢＤ９２２１Ｆ FUNCTION ・Using 20V process / 1ch control with Push-Pull ・BD9221F can synchronous operating with external sync-signal ・Accuracy of drive output frequency：3.5%（IC Only/Built-in CT Capacitor） ・High accuracy timer latch current(±15%) ・Built-in FAIL function ・Adjustable latch timing ・Adjustable slow start time ・Lamp current and voltage sense feedback control ・Mode-selectable the operating or stand-by mode by STB pin (Typ.=0uA ) ○Absolute Maximum Ratings（Ta = 25℃） Parameter Symbol Limits Unit VCC 20 V N1, N2 20 V Topr -40～+85 ℃ Storage Temperature Range Tstg -55～+150 ℃ Maximum Junction Temperature Tjmax +150 ℃ Pd SOP18:687* mW Supply Voltage OUTPUT PIN Voltage Operating Temperature Range Power Dissipation *1 Pd derate at -5.5mW/℃ for temperature above Ta = 25℃ (When mounted on a PCB 70.0mm×70.0mm×1.6mm) 〇動作範囲 項目 Supply voltage 記号 範囲 単位 VCC 8.0 ～ 18.0 V 40～180 kHz F_PWM_IN 0.060～0.5 kHz F_OUT 20 ～ 90 kHz Input Frequency Ratio CLK_IN PIN F_CLK_IN Input Frequency Ratio PWM_IN PIN DRIVER frequency REV. A 2/4 ○Electric Characteristics（Ta=25℃、VCC=12V、STB=3.0V） LIMIT Item SYMBOL MIN. TYP. MAX. UNIT CONDITION Operating current Icc1 － 2.0 4.0 mA RT=100kΩ, FB=GND, IS=1.5V Stand-by current Icc2 － 0 20 μA VSTB=0V Stand-by voltage H VSTBH 2 - VCC V System ＯＮ Stand-by voltage L VSTBL -0.3 - 0.8 V STB PIN pull down resistor RSTB 180 375 750 kΩ Operating voltage VCC_UVLO 7.2 7.5 7.8 V VCC=6V→8V sweep Hesteresis width ⊿UVLO_HYS 0.3 0.5 0.7 V VCC=8V→6V sweep RT pin Voltage VRT 1.300 1.500 1.700 V RT=100kΩ SRT ON resistance RSRT － 75 150 Ω VSRT=0.1V (（WHOLE DEVICE）) ((STAND BY CONTROL）） System ＯＦＦ VSTB=2V （（VCC UVLO BLOCK））） （（OSC BLOCK） ） ((Synchronous Block)) CLK_IN PIN voltage H 2.4 - 5 V V_CT_SYNC_IN=0V⇒3.0V CLK_IN PIN voltage L VCTSIN_H VCTSIN_L -0.3 - 0.8 V V_CT_SYNC_IN=3.0V⇒0V CLK_IN PIN pull down resistor R_CTSIN 1000 2000 4000 kΩ VCT_SYNC_IN=5V ((PWM Dimming Block)) PWM_IN PIN voltage H VPWMIN_H 2.4 - 5 V VPWM_IN=0V⇒3.0V PWM_IN PIN voltage L VPWMIN_L -0.3 - 0.8 V VPWM_IN=3.0V⇒0V PWM_IN PIN pull down resistor R_PWMIN 1000 2000 4000 kΩ IS threshold voltage VIS 1.225 1.250 1.275 V VS threshold voltage VVS 1.200 1.250 1.300 V IS source current IIS 16 20 24 μA VISCOMP 0.565 0.625 0.685 V SS term END Voltage VSS 2.400 2.500 2.600 V Soft start current ISS 1.7 2.0 2.3 μA VPWM_I=5V （（FEED BACK BLOCK）） IS COMP detect voltage IS=1.0V IS=1.3V→0.5V （（SLOW START BLOCK）） VSS=0V⇒3V VSS=1.0V IS=1.5V （（COMP BLOCK）） COMP over voltage detect voltage VCOMPH 1.900 2.000 2.100 V VSS＞2.5V VCOMP=1.5V→2.5V ⊿VCOMPH 0.100 0.200 0.300 V VSS＜2.0V VCOMP=2.5V→1.5V COMP PIN pull down resistor RCOMP 1000 2000 4000 kΩ COMP=5V FAIL ON resistance RFAIL － 75 150 Ω VFAIL=0.1V 3.0 6.0 Ω IIN=100mA IIN=-100mA Hysterisis width (COMP) （（OUTPUT BLOCK）） N1,N2 PIN output sink resistance N1,N2 PIN output source resistance RsinkN 1.5 RsourceN 4.5 9 18 Ω MAX DUTY MAX DUTY 45 47.0 49.5 % FOUT 48.25 50 51.75 kHz Timer Latch setting voltage VCP 2.900 3.000 3.100 V Timer Latch setting current ICP 1.7 2.0 2.3 μA Drive output frequency FOUT=50kHz RT=100kΩ Without Synchronous signal （（TIMER BLOCK）） （This product is not designed to be radiation-resistant.） REV. A VCP=0V⇒3.2V CP=1.0V IS=1.5V COMP=3.0V 3/4 〇Package Dimensions Device name MAX11.55 (include. BURR) BD9221F Lot No. SOP-18 (Unit:mm) 〇PIN No.・PIN NAME・FUNCTION BD9221F No. PIN Function No. PIN Function 1 VCC Supply voltage input 18 N1 NMOS FET driver 2 STB Stand-by switch 17 N2 NMOS FET driver External resistor from SRT to RT for adjusting 3 SRT 4 RT 5 GND GROUND the triangle oscillator 16 PGND Ground for FET drivers External resistor from SRT to RT for adjusting the triangle oscillator 15 CLK_IN OUTPUT synchronous signal input pin 14 PWM_IN Dimming pulse signal input pin 6 - Non Conection 13 SS External capacitor from SS to GND for Soft Start Control 7 FB Error amplifier output 12 CP External capacitor from CP to GND for Timer Latch 8 IS Error amplifier input 11 FAIL Error signal output pin 9 VS Error amplifier input 10 COMP Over voltage detect pin ○Setting of synchronous function BD9221F output frequency with ＜CLK_IN Freq.＊1/2＞to N1 and N2 pin. （signal amplitude level : H=over 2.4V ,L=under0.8V） Set the IC frequency by adjusting RT resistor value, in order to satisfy under synchronous condition. F(IC)=F(CLK_IN)*1/2*A F(IC)･･･IC Freq. F(CLK_IN)･･･Synchronous Freq. A･･･under 90%／over 75% However this synchronous function is connected with SRT movement. SRT=OFF(OPEN) : synchronous mode. SRT=ON(LOW):IC Frequency mode. REV. A 4/4 〇NOTE FOR USE 1. This product is produced with strict quality control, but might be destroyed if used beyond its absolute maximum ratings. Once IC is destroyed, failure mode will be difficult to determine, like short mode or open mode. Therefore, physical protection countermeasure, like fuse is recommended in case operating conditions go beyond the expected absolute maximum ratings. 2. The circuit functionality is guaranteed within of ambient temperature operation range as long as it is within recommended operating range. The standard electrical characteristic values cannot be guaranteed at other voltages in the operating ranges, however the variation will be small. 3. Mounting failures, such as misdirection or miscounts, may harm the device. 4. A strong electromagnetic field may cause the IC to malfunction. 5. The GND pin should be the location within ±0.3V compared with the PGND pin. ALL voltage should be under VCC voltage +0.3V 6. BD9221F incorporate a built-in thermal shutdown circuit (TSD circuit). The thermal shutdown circuit (TSD circuit) is designed only to shut the IC off to prevent runaway thermal operation. It is not designed to protect the IC or guarantee its operation of the thermal shutdown circuit is assumed. 7. When modifying the external circuit components, make sure to leave an adequate margin for external components actual value and tolerance as well as dispersion of the IC. 8. About the external FET, the parasitic Capacitor may cause the gate voltage to change, when the drain voltage is switching. Make sure to leave adequate margin for this IC variation. 9. Under operating CP charge (under error mode) analog dimming and burst dimming are not operate. 10. Under operating Slow Start Control (SS is less than 2.5V), It does not operate Timer Latch. 11. By STB voltage is changed to 2 states. Therefore, do not input STB pin voltage between one state and the other state (0.8～2.0V). 12. The pin connected a connector need to connect to the resistor for electrical surge destruction. 13. This IC is a monolithic IC which (as shown is Fig-1) has P+ substrate and between the various pins. A P-N junction is formed from this P layer of each pin. For example, the relation between each potential is as follows, ○(When GND > PinB and GND > PinA, the P-N junction operates as a parasitic diode.) ○(When PinB > GND > PinA, the P-N junction operates as a parasitic transistor.) Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits as well as operation faults and physical damage. Accordingly you must not use methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin. Transistor (NPN) Resistance (PinA) (PinB) B E C Ｃ GND P P＋ N P＋ N Ｎ P substrate GND Parasitic diode N Ｎ N P substrate GND Parasitic diode (PinB) (PinA) B CＣ Ｂ EＥ Parasitic diode GND GND Parasitic diode Other adjacent components Fig-1 Simplified structure of a Bipolar IC REV. A 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. 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