1/4 STRUCTURE PRODUCT NAME ： ： Silicon Monolithic Integrated Circuit DC/DC converter IC for camera module for car navigation system MODEL NAME ： BD8671KN ： Fig. - 2 BLOCK DIAGRAM ◎FEATURES： ・+3.3V output Step down DC/DC converter for asynchronous rectification system ・+12V output Boost DC/DC converter for asynchronous rectification system ・-5V output Voltage control charge pump for reversing type for negative voltage ・Soft start function ・Building in low voltage and over voltage protection function ・Building in terminal RT OPEN/Short protection ・The frequency can be set by external resistance ・Concentrated protection control with built-in sequencer ・VQFN-28 package ◎ABSOLUTE MAXIMUM RATING:（Ta=25℃） Parameter VIN supply voltage PVIN supply voltage Input terminal voltage 1*1 Input terminal voltage 2*2 Input terminal voltage 3*3 Input terminal voltage 4*4 Output terminal voltage 1*5 Output terminal voltage 2*6 Output terminal voltage 3*7 Output terminal voltage 4*8 Output terminal voltage 5*9 Power dissipation Operating temperature Storage temperature *1 *4 *8 *10 *11 Symbol VIN PVIN VIN1 VIN2 VIN3 VIN4 VOUT1 VOUT2 VOUT3 VOUT4 VOUT5 Pd Topr Tstg Limits -0.3 -0.3 -0.3 -0.3 -0.3 -10.0 -0.3 -0.3 -0.3 -0.3 VIN4 -40 -55 ～ ～ ～ ～ ～ ～ ～ ～ ～ ～ ～ 0.725*11 ～ ～ Unit +18.0 VIN VIN +20.0 +20.0 +0.3 VIN PVIN +20.0 VIN3*10 +0.3 +85 +150 V V V V V V V V V V V W ℃ ℃ FB12、SS12、TEST1、TEST2、TEST3、RT、CTL1、CTL2、CTL3、SS33、V33 terminal voltage *2 V12 terminal voltage *3 V12IN terminal voltage MV8 terminal voltage *5 FC12 terminal voltage *6 SW33 terminal voltage *7 SW12 terminal voltage V8、CP terminal voltage *9 MV5、CM terminal voltage V8 terminal voltage ABSOLUTE MAXIMUM RATING is VIN3 or 10V is low. Between V8 terminal voltage and MV5 terminal voltage ABSOLUTE MAXIMUM RATING is 15V. 70mm×70mm, thickness1.6mm, less than 3% share of copper foil when implementing glass epoxy board. Operating at higher than Ta=25℃, 5.8mW shall be reduced per 1 ◎OPERATION CONDITION Parameter (Please set the power-supply voltage in consideration of a power dissipation.) Symbol VIN supply voltage VIN This product is not designed for protection against radioactive rays. MIN TYP MAX Unit 4.5 6.0 9.0 V REV. A 2/4 ◎ELECTRICAL CHARACTERISTICS (Unless otherwise noted Ta=25℃, VIN=6.0V,PVIN=6.0V,CTL1,2,3=6.0V,GND=0V) Parameter specification value Symbol MIN TYP MAX Condition UNIT VIN,PVIN Circuit current 1 IQ1 - 0 50 μA VIN,PVIN Circuit current 2 IQ2 - 4.1 6.1 mA V12IN Circuit current IQ３ - 2.3 3.3 mA Range of DC/DC converter oscillation frequency setting FOSC 500 1000 1200 kHz V033 RV33DIS ISS33 VSS33TH VSS33CLM VSS33STB 3.234 3.300 3.366 V 270 390 500 Ω -4.0 -2.5 -1.0 μA 1.0 1.1 1.2 V 1.6 1.9 2.2 V 0.11 0.15 0.19 V VSS33STB_HYS RSS33DIS VSS33PON 5 50 100 mV 4.9 7.0 9.1 kΩ 1.0 1.1 1.2 V VSS33PON_HYS 10 100 200 mV VV33LVP 1.11 1.32 1.53 V VV33LVP_HYS 41.2 412 824 mV VV33OVP 4.45 4.95 5.45 V V012 RV12DIS VFC12H VFC12L IFC12SINK 11.76 12.00 12.24 V 270 390 500 Ω 1.2 - - V - - 0.2 V 0.3 - - mA CTL1,2,3=0V CTL1,2,3=VIN、 VV33=3.5V VV12=13.0V 、VV12IN=12.0V CTL1,2,3=VIN、 VV33=3.5V VV12=13.0V 、VV12IN=12.0V It is possible to set it with the terminal RT. <Step-down DC/DC converter of 3.3V output part> 3.3V output voltage Terminal SS Discharge resistance Terminal SS Charging current Terminal SS Threshold voltage Terminal SS Clamping voltage Terminal SS Standby voltage Terminal SS Standby voltage Maximum hysteresis error Terminal SS Discharge resistance Terminal SS Protection circuit start voltage Terminal SS Protection circuit start voltage Maximum hysteresis error Terminal V33 Low voltage detection voltage Terminal V33 Low voltage detection Maximum hysteresis error Terminal V33 Overvoltage detection voltage CTL1,2,3=0V VSS33=1.0V VSS33voltage、VV33=3.3V VSS33 voltage (L→H) CTL1,2,3=6.0→0.0V VSS33 voltage (L→H) VSS33 voltage VV33 voltage (H→L) VV33 voltage VV33 voltage (L→H) < Boost DC/DC converter of 12V output part > 12V output voltage Terminal V12 Discharge resistance Terminal FC12 Clamping voltage H Terminal FC12 Clamping voltage L Terminal FC12 Sink current Terminal FC12 Source current Terminal SS12 Charging current Terminal SS12 Threshold voltage Terminal SS12 Clamping voltage Terminal SS12 Standby voltage Terminal SS12 Standby voltage Maximum hysteresis error Terminal SS12 Discharge resistance Terminal SS12 Protection circuit start voltage Terminal SS12 Protection circuit start voltage Maximum hysteresis error Terminal V12Low voltage detection voltage Terminal V12 Low voltage detection Maximum hysteresis error Terminal V12 Overvoltage detection voltage IFC12SOURCE ISS12 VSS12TH VSS12CLM VSS12STB CTL1,2,3=0V VV12=10.5V VV12=13.5V VV12=13.5V、VFC12=0.4V VV12=10.5V、VFC12=1.4V VSS12=1.0V VSS12 voltage、VFB12=0.8V - - -14 μA -4.0 -2.5 -1.0 μA 1.0 1.1 1.2 V 1.6 1.9 2.2 V 0.11 0.15 0.19 V VSS12STB_HYS 5 50 100 mV RSS12DIS VSS12PON 4.9 7.0 9.1 kΩ 1.0 1.1 1.2 V VSS12PON_HYS 10 100 200 mV VV12LVP 4.0 4.8 5.6 V VV12 voltage (H→L) VV12LVP_HYS 0.15 1.5 3.0 V VV12 voltage VV12OVP 16.2 18.0 19.8 V VV12 voltage (L→H) VMV5 RMV5DIS VMV5OVP VMV5PON VMV5LVP -5.10 -5.00 -4.90 V 200 320 430 Ω -8.25 -7.50 -6.75 V -4.5 -3.5 -2.5 V -2.5 -2.0 -1.5 V MV8= -8.0V CTL3=0V、VV8=8.0V VMV5 voltage、VV33=3.3V VMV5 voltage (H→L)、VV33=3.3V VMV5 voltage (L→H)、VV33=3.3V VMV5LVP_HYS 62.5 625 1250 mV VSS12 voltage (L→H) CTL1,2,3=6.0→0.0V VSS12 voltage (L→H) VSS12 voltage < -5V output reversing charge pump part > Terminal MV5 output voltage Terminal MV5 Discharge resistance Terminal MV5 Overvoltage detection voltage Terminal MV5 Protection circuit start voltage Terminal MV5 Low voltage detection voltage Terminal MV5 Low voltage detection Maximum hysteresis error ●VV33 ： V33 voltage、VVSS33 ： SS33 voltage、VV12： V12 voltage、VFC12 ： FC12 voltage、 VSS12： SS12 voltage、 VMV5 ： MV5 voltage 、VMV8：MV8 voltage、VV8：V8 voltage、VV12IN：V12IN voltage ●This product is not designed for protection against radioactive rays. ●The current ability must not exceed Pd. REV. A VMV5 voltage、V33=3.3V 3/4 ◎PIN ASSIGNMENT No. Symbol 1 V12 Description 12V output voltage detection terminal No. Symbol 15 TEST1 2 FB12 Error amplifier input terminal 16 SW33 3 FC12 Error amplifier output terminal 17 PGND33 4 SS12 12V soft start adjustment capacity connection terminal 18 SS33 5 PGND12 GND(0V connection) 19 V33 Description Test terminal 2(0V is connected and use it usually). 3.3V coil connection terminal Power GND (the same potential as terminal GND) 3.3V soft start adjustment capacity connection terminal 3.3V output voltage detection terminal 6 SW12 12V coil connection terminal 20 TEST3 Test terminal 3 (It uses it by the open usually.) 7 TEST2 Test terminal 2(0V is connected and use it usually). 21 SGND Sense GND(the same potential as terminal GND) 8 CTL1 3.3V output control terminal 22 MV5 -5V regulator output terminal 9 VIN Power supply input terminal 23 MV8 -8V charge pump output terminal 10 GND GND(0V connection) 24 CM Capacity connection terminal for charge pump (－) 11 RT Frequency adjustment resistance connection terminal 25 PGNDV8 Power GND (the same potential as terminal GND) 12 PVIN Power supply input terminal for PowerTr (=VIN) 26 CP Capacity connection terminal for charge pump (＋) 13 CTL3 -5V output control terminal 27 V8 8V regulator output terminal 14 CTL2 12V output control terminal (*12) 28 V12IN *12 LDO12V voltage input terminal H->L (ON->OFF) control, When CTL3=L. (Refer to NOTE ON USE-13) ◎PACKAGE OUTLINE ◎BLOCK DIAGRAM VIN VREG BG Product number OVP LVP PON V12IN D8671 PVIN V8 D R V OSC 1pin mark LOT No. SW33 V8IN OSC CP V33 PON,LVP,OVP CM MV8 MV8IN SS33 V33 PGND12 MV5 PON,LVP,OVP MV5 OSC TSD CTL1 BG D R V SW12 FC12 FB12 CTL2 V12 PON,LVP,OVP CTL3 VQFN-28 PGND33 SEQUENCER Charge Pump Cntorol PGNDM8 （UNIT：mm） RT OSC OSC V12 TSD TEST3 TEST2 TEST1 Fig.-１ PACKAGE OUTLINE GND SGND Fig.-2.BLOCK DIAGRAM REV. A SS12 4/4 ◎NOTE ON USE 1．About the absolute maximum rating Attention is brushed off enough to the quality control, it is likely to destroy when the absolute maximum rating such as impressed voltages (VCC_IN,DCIN) and ranges (Topr) of the operating temperature as it is exceeded, the mode of breakings of the short or the opening, etc. cannot be specified, and examine it in this IC to give physical measures for safety such as fuses when a special mode that exceeds the absolute maximum rating is assumed. 2．About the reverse-connection of the power supply connector IC might destroy it by reversely connecting the power supply connector. Give measures such as putting the diode between power supply terminals of power supply and IC outside for the reverse-touching destruction protection. 3．Power supply line Please do measures such as putting the bypass capacitor in power supply-GND nearest pin of this IC as the route of the resurrection current to cause the return of the current in which it resurrected it by the counter electromotive force of the coil. Please confirm the characteristic of the electrolytic capacitor enough as the capacity omission etc. at the low temperature never happen, and decide it. 4．About grand potential Any state of operation must become the lowest potential about the potential of the terminal GND. Moreover, confirm whether there is terminal that is actually the voltage of GND or less including transients. 5．About the heat design Think about permissible loss (Pd) in an actual state of use, and do the heat design with the margin enough. 6．About the short and the miss-installation between terminals Note the direction and the miss-registration of IC enough when you install it in the set substrate. IC might destroy it as well as reversely connecting the power supply connector when installing it by mistake. Moreover, there is fear of destruction when the foreign body enters between terminals, the terminal, the power supply, and grandeur and it is short-circuited. 7．About operation in strong electromagnetic field In use in strong electromagnetic field, note that there is a possibility of malfunctioning. 8．About the capacitor during output-GND The current charged the capacitor with when VCC is 0V or is GND and is short-circuited when a big capacitor is connected between GND output by some factors flows into the output and it is likely to destroy it. Give the capacitor between GND output to 0.1μF or less. 9．About the inspection by the set substrate It is likely to suffer stress to IC and discharge electricity every one process when you connect the capacitor with the pin with low impedance when inspecting it in the set substrate. Moreover, detach it after connecting after the power supply is turned off without fail when detaching it to G in the inspection process, inspecting, and turning off the power supply. n addition, be give the earth to the assembly process as a static electricity measures, and careful enough when it transports and you preserve it. 10．About each input terminal + This IC is a monolithic IC which has a P isolations and P substrate to isolate elements each other. This P layer and an N layer in each element form a PN junction to construct various parasitic elements. For instance, the potential difference operates in resistance as shown in the figure below when resistance and the transistor connect it with the terminal and the playground (GND) >(terminal B) joint of PN operates as a parasitic diode in playground (GND) >(terminal A) transistor (NPN). In addition, the NPN transistor of parasitism works with N layer of the element of the above-mentioned parasitic diode and the neighborhood and others in transistor (NPN). A parasitic element in IC composition is inevitably formed because of the potential relation. A parasitic element can operate, the interference with the circuit operation be caused, it malfunction, and, consequently, it cause destruction. Therefore, do not do the usage that a parasitic element operates as a voltage that is lower than the playground (GND;P substrate) is impressed to the input terminal enough. Moreover, do not impress the voltage to the input terminal when you do not impress the power-supply voltage to IC. Give each input terminal to me the voltage below the power-supply voltage or in the guarantee value of an electric characteristic when you similarly impress the power-supply voltage. Example of IC of simple structure 11．Earth wiring pattern If small signal GND and large current GND exist, disperse their pattern. In addition, for voltage change by pattern wiring impedance and large current not to change voltage of small signal GND, each ground terminal of IC must be connected at the one point on the set circuit board. As for GND of external parts, it is similar to the above-mentioned. 12．Thermal Shut-Down When a thermal shutdown operates, the DC/DC converter controller of all Ch is turned off. When a thermal shutdown is released, the DC/DC converter controller of all Ch becomes an operation beginning from turning off. 13．DC/DC converter control terminal (CTL1,2,3) This IC has 3 output voltage (3.3V,12.0V,-5.0V). When you turning off control 12.0V output from all output ON(CTL1,2,3=H) time with the terminal CTL2, please control 12.0V output turning off with the terminal CTL2 after 200μs or more has passed by the terminal CTL3 since -5.0 the V output was turning off controlled. 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. 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. 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