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BM81810MUF-M 데이터시트(PDF) 64 Page - Rohm

부품명 BM81810MUF-M
부품 상세설명  Automotive Panel Power Management IC
Download  78 Pages
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제조업체  ROHM [Rohm]
홈페이지  http://www.rohm.com
Logo ROHM - Rohm

BM81810MUF-M 데이터시트(HTML) 64 Page - Rohm

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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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