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BM2SCQ122T-LBZ Dataheets PDF



Part Number BM2SCQ122T-LBZ
Manufacturers ROHM
Logo ROHM
Description Quasi-resonant AC/DC Converter
Datasheet BM2SCQ122T-LBZ DatasheetBM2SCQ122T-LBZ Datasheet (PDF)

Datasheet Quasi-resonant AC/DC Converter Built-in 1700 V SiC-MOSFET BM2SCQ12xT-LBZ Series General Description This is the product guarantees long time support in industrial market. BM2SCQ12xT-LBZ series is a quasi-resonant AC/DC converter that provides an optimum system for all products which has an electrical outlet. Quasi-resonant operation enables soft switching and helps to keep the EMI low. This IC can be designed easily because it includes the 1700 V/4 A SiC (Silicon-Carbide) MOSFET. De.

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Datasheet Quasi-resonant AC/DC Converter Built-in 1700 V SiC-MOSFET BM2SCQ12xT-LBZ Series General Description This is the product guarantees long time support in industrial market. BM2SCQ12xT-LBZ series is a quasi-resonant AC/DC converter that provides an optimum system for all products which has an electrical outlet. Quasi-resonant operation enables soft switching and helps to keep the EMI low. This IC can be designed easily because it includes the 1700 V/4 A SiC (Silicon-Carbide) MOSFET. Design with a high degree of flexibility is achieved with current detection resistors as external devices. The burst operation reduces an input power at light load. BM2SCQ12xT-LBZ series includes various protection functions, such as soft start function, burst operation, over current limiter per cycle, over-voltage protection function, overload protection function. Key Specifications  Operating Power Supply Voltage Range: VCC: 15.0 V to 27.5 V DRAIN: 1700 V (Max)  Normal Operating Current: 2000 µA (Typ)  Burst Operating Current: 500 µA (Typ)  Maximum Operating Frequency: 120 kHz (Typ)  Operating Temperature: -40 °C to +105 °C Package TO220-6M W (Typ) x D (Typ) x H (Max) 10.0 mm x 4.5 mm x 25.6 mm Features  Long Time Support Product for Industrial Applications  6 Pins: TO220-6M Package  Built-in 1700 V/4 A/1.12 Ω SiC-MOSFET  Quasi-resonant Type (Low EMI)  Frequency Reduction Function  Low Current Consumption (19 µA) during Standby  Burst Operation at Light Load  SOURCE Pin Leading Edge Blanking  VCC UVLO (Under Voltage Lockout protection)  VCC OVP (Over Voltage Protection)  Over Current Protection Circuit per Cycle  Soft Start Function  ZT Pin Trigger Mask Function  ZT OVP (Over Voltage Protection) Applications Power Supply for Industrial Equipment, AC Adaptor, Household Appliances Lineup Product name BM2SCQ121T-LBZ BM2SCQ122T-LBZ BM2SCQ123T-LBZ BM2SCQ124T-LBZ FB OLP Auto Restart Latch Auto Restart Latch VCC OVP Latch Latch Auto Restart Auto Restart Typical Application Circuit FUSE Filt er Diode Bridge DRAI N SOURCE FB GND ZT VCC ERROR AMP Product structure :Silicon and silicon carbide integrated circuit .www.rohm.com © 2018 ROHM Co., Ltd. All rights reserved. TSZ22111 • 14 • 001 This product has no designed protection against radioactive rays 1/30 TSZ02201-0F1F0A200470-1-2 03.Dec.2019 Rev.003 BM2SCQ12xT-LBZ Series Pin Configuration (TOP VIEW) DRAIN 1 SOURCE FB GND ZT VCC 2 345 6 Pin Description Pin No. 1 2 3 4 5 6 Pin Name DRAIN SOURCE FB GND ZT VCC I/O Function I/O MOSFET DRAIN pin I MOSFET SOURCE pin I Feedback signal input pin I/O GND pin I Zero current detection pin I Power supply input pin ESD Diode VCC GND -✔ ✔✔ ✔✔ ✔- -✔ -✔ www.rohm.com © 2018 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001 2/30 TSZ02201-0F1F0A200470-1-2 03.Dec.2019 Rev.003 BM2SCQ12xT-LBZ Series Block Diagram FUSE Filter Diode Bridge RSTA RT CVCC VH VOUT Va 6 VCC 1 DRAIN NOUT VCC UVLO + - 18.5 V/14.0 V 4.0 V Regulator Internal Supply 18.0 V Clamper + - ZT ACSNS Comp. + - SiC1-M70O0SVFETRZT1 + - ZT OVP Comp. (LATCH) 28.0 V VCC OVP OSC OSC ZT 5 ZT Comp. + 1 shot - AND OR Time Out CZT RZT2 7 V ( 45 µs ) ZT 200 mV Blanking AND SQ POUT OUT(H->L) 0.60 µs NOUT OR FBOLP_OH AND PRE Driver OUT Maximum VREF(4 V) + + - Blanking Frequency (120 kHz) R NOUT FB 3 20 kΩ 1.00 V Burst Comp. + - CFB 0.50 V OL P + Timer FBOLP_OH - (128 ms) ERROR AMP 200 kΩ 200 kΩ DCDC FB/2 Comp. - 1.00 V - + Soft Start CURRENT SENSE (V-V Change) Normal: x 1.0 Leading Edge Blanking 4 GND SOURCE 2 RS PC www.rohm.com © 2018 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001 3/30 TSZ02201-0F1F0A200470-1-2 03.Dec.2019 Rev.003 BM2SCQ12xT-LBZ Series Description of Blocks 1 Startup Sequences (FB OLP: Auto Recovery Mode) The BM2SCQ12xT-LBZ’s startup sequence is shown in Figure 1. See the sections below for the detailed descriptions. Input Voltage VH VCC Pin Voltage VFLOP1 VFLOP2 FB Pin Voltage VOUT IOUT Switching 19.5 V Internal REF Pull Up 128 ms 14.0 V 128 ms Normal Load Light Load Over Load Burst Mode Soft Start A BC D E F GH 128 ms Time IJ K Figure 1. Startup Sequence Timing Chart A: The input voltage VH is applied. B: The VCC pin voltage rises due to start resistor RSTART, and this IC starts operating when the VCC pin voltage becomes higher than VUVLO1 (Typ = 19.5 V). When the protection functions are judged as normal status, the switching operation starts. At that time, since the VCC pin voltage value always drops due to the pin's consumption current, it is necessary to set the VCC pin voltage to higher than VUVLO2 (Typ = 14.0 V). C: The IC has a soft start function which regulates the voltage level at the SOURCE pin to prevent an excessive rise in voltage and current. D: When the switching operation starts, VOUT rises. At startup, .


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