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BM81810MUF-M Scheda tecnica(PDF) 64 Page - Rohm |
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BM81810MUF-M Scheda tecnica(HTML) 64 Page - Rohm |
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64 / 78 page  BM81810MUF-M . 64/75 TSZ02201-0A3A0AS00510-1-2 © 2020 ROHM Co., Ltd. All rights reserved. 15.May.2020 Rev.001 TSZ22111 • 15 • 001 www.rohm.com Protection function explanation of POWER MANAGEMENT block I. UNDER VOLTAGE LOCK OUT (UVLO) The BM81810MUF-M has UVLO function for VIN and a circuit miss-operation during in under UVLO voltage operation is prevented. If VIN below UVLO voltage, it shuts down VDD, AVDD, VGH, VGL, GPM, VCOM and RESET. II. THERMAL SHUTDOWN (TSD) The BM81810MUF-M incorporates a Thermal Shut Down (TSD) function. If IC temperature exceeds 175°C (TYP), it shuts down VDD, AVDD, VGH, VGL, GPM, VCOM and RESET. III. UNDER VOLTAGE PROTECTION (UVP) This block has Under Voltage Protection (UVP) function for VDD, AVDD, VGH and VGL output. When detecting UVP, inner Counter will be activated, and after 5ms passed, it shuts down VDD, AVDD, VGH, VGL, GPM, and VCOM. (It also shuts down RESET when RESET monitors VDD voltage.) IV. OVER VOLTAGE PROTECTION (OVP) This block has Over Voltage Protection (OVP) function for AVDD output. When detecting OVP, output voltage rising is limited by forcing Switching turn off. If output voltage falls, Switching is restarted. V. OVER CURRENT PROTECTION (OCP) This block has Over Current Protection (OCP) function for VDD and AVDD. When detecting OCP, it controls Switching and limits generating over current in FET. BLOCK Protective Function Working Condition Action Protective removal VDD Over current Protection ( Buck DCDC mode ) ISWB > 1.0 A (Min) Control switching pulse duty to not over current limit ISWB < 1.0 A (Min) Over current Protection ( LDO mode ) ISWB > 0.3 A (Min) Control LDO to not over current limit. ISWB < 0.3 A (Min) Under Voltage Protection Detect : VDD<Target value x 0.8 Release : VDD>Target value x 0.9 IC shutdown if UVP status maintains during 5ms IC restart AVDD Over Voltage Protection AVDD > (Target value x 1.1) Switching STOP AVDD < ( Target Value x 1.05 ) Over current Protection ISW > 1.0 A (Min) or 2.0 A (Min) Control switching pulse duty to not over current limit ISW < 1.0 A (Min) or 2.0 A (Min) IC shutdown if OCP status maintains during 5ms IC restart Under Voltage Protection Detect : AVDD<Target value x 0.8 Release : AVDD>Target value x 0.9 IC shutdown if UVP status maintains during 5ms IC restart VGH Under Voltage Protection Detect : VGH<Target value x 0.8 Release : VGH>Target value x 0.9 IC shutdown if UVP status maintains during 5ms IC restart VGL Under Voltage Protection Detect : VGL>Target value x 0.8 Release : VGL<Target value x 0.85 IC shutdown if UVP status maintains during 5ms IC restart General Under Voltage Lockout VIN < 2.0V (Min) IC shutdown VIN > 2.55V (Typ) Thermal shutdown Tj > 175°C (Typ) IC shutdown Tj < 150°C (Typ) |
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