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BD9855MWV Datasheet(PDF) 1 Page - Rohm |
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BD9855MWV Datasheet(HTML) 1 Page - Rohm |
1 / 5 page 1/4 REV. C STURUCTURE Silicon Monolithic Integrated Circuit Type 4 Channel Switching Regulator control system for DSC PRODUCUT SERIES BD9855MWV THYSICAL DIMENSIONS Package(Plastic Mold) Fig.1、Block Diagram Fig.2、Pin Description Fig.3 FEATURES ●Include step-down 2ch,Cross converter 1ch,step down/inverting 1ch. ●Short Circuit Protection (SCP), Under Voltage Lockout Function (UVLO), Include external synchronous rectification operation ●Independent ON/OFF Function Each Channel、UQFN044V6060 Package(0.4mm pitch) ○Absolute Maximum Ratings(Ta=25℃) (*1) Without external heat sink, the power dissipation degrades by 4.2mW/℃ above 25℃. (*2)Power dissipation degrades by 8.0mW/℃ above 25℃, when mounted on a PCB (70mm×70mm×1.6mm). ○Operating Conditions Parameter Symbol Spec. Unit Condition MIN TYP MAX 【Input Voltage】 Power Supply Voltage VCC,PVCC 4 6 14 V 【Reference Output】 VREG,VREGA terminal capacitor CVR* 0.47 1.0 2.2 μF VREF terminal capacitor CVREF 0.047 0.1 2.2 μF 【Protect Circuit】 SCP terminal capacitor CSCP 0.001 - 2.2 μF 【Oscillator】 Oscillator frequency Fosc 0.6 1.0 1.5 MHz OSC timming resistor RT 47 82 120 kΩ RTSS terminal capacitor CRTSS 1000 10000 - pF SYNC terminal input H VSYNCH 3.0 - VCC V SYNC terminal input L VSYNCL -0.3 - 0.5 V SYNC terminal input Duty Dsync 40 50 60 % 【Driver】 BST-Lx voltage Vbst 3.5 - 5.5 V BST-Lx capacitor Cbst 0.047 0.1 0.22 μF LX31terminal input voltage VLX31 - - 14 V CH3 output range VVOUT3 4.0 - 7.0 V PVCC1,2,4 terminal input voltage PVCC1,2,4 - - 14 V CH1,2,3output current Ioutch1,2,3 - - 1 A ※)Please connect capacitor at input/output terminal (VCC,PVCC,VREF,VREG etc.) to operate IC stabilize. Status of this document The Japanese language version of this document shall be the official specification. Any translation of this document shall be for reference only. Parameter Symbol Limits Units Po wer Sup pl y V ol t ag e VCC,PVCC -0.3~15 V In pu t V o lt ag e BST1-LX1、BST2-LX2 -0.3~7 V LX31 -0.3~15 V Vo3,LX32 -0.3~8.4 V PG,SYNC, CTL1,2,3,4 -0.3~15 V SEL -0.3~7 V Pow e r Dissip a t i on Pd 540(*1),1000(*2) mW Op er at ing Te m p era t ur e Topr -25~+85 ℃ S tora ge Te mpe r at ure Tstg -55~+150 ℃ Junction Te mperature Tjmax 150 ℃ |
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