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BD3381EKV-C PDF预览

BD3381EKV-C

更新时间： 2024-09-26 11:08:15
品牌 Logo 应用领域
罗姆 - ROHM 机械电池开关
页数 文件大小 规格书
81页 3867K
描述
BD3381EKV-C是33通道的开关输入监测LSI。其作用是监测各通道所连接的机械开关的状态变化、使MCU产生中断。使用串行接口读取中断因素并写入内部寄存器。33通道的开关输入分为VPUB、VPUA两种电源系统，可按电池系统和电源控制系统分类使用。动作模式备有常规模式和睡眠模式两种。各模式可通过设定寄存器，使用开关端子连续监测设定和间歇监测设定。使用间歇监测设定时是以固定周期监测开关状态变化，可降低功耗。而且，通过使用各种电源系统时序动作和全部开关统一时序动作设定，还能实现低噪声动作。

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BD3381EKV-C 数据手册

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Datasheet  
Multiple Input Switch Monitor LSI for  
Automotive  
BD3381EKV-C  
General Description  
Features  
BD3381EKV-C is a 33-channel Multiple Input Switch  
Monitor IC that detects the opening and closing of  
mechanical switches. Once it senses a change in the  
status of a switch, it sends an interrupt signal to the MCU  
via a serial peripheral interface (SPI).  
AEC-Q100 Qualified (Note 1)  
Uses 3.3 V/5.0 V SPI Protocol in Communicating with  
the MCU  
Serial Communication Error Checking through 8-bit  
CRC  
The 33 switch inputs have two types of power supply,  
VPUB and VPUA. The VPUB and the VPUA power  
supplies can either be from a battery or from another  
power supply system. VPUB is the supply for the INB  
inputs while VPUA is for the INZ and INA inputs.  
BD3381EKV-C has two modes of operation, Normal and  
Sleep. In both modes, the internal registers can be set to  
make the device perform either intermittent or continuous  
monitoring of the switches.  
In intermittent monitoring, the switch status is monitored  
at regular time intervals, allowing the IC to operate with  
low power consumption. Also, operation with reduced  
noise can be achieved by enabling uniform sequential  
monitoring of all switches or sequential monitoring by  
power supply system.  
Thermal Shutdown Protection (TSD)  
Power on Reset (POR)  
Selectable Source/Sink Current Levels through Register  
Settings  
Wetting Current Timer Capability  
12 Source or Sink Input Pins (VPUA)  
21 Source Input Pins  
Separable Power Supply  
VPUA: 22-channel (INA&INZ), VPUB: 11-channel (INB)  
Interrupt Notification upon Switch Status Change  
1 Time to 10 Times Matched LPF that Eliminates Input  
Pin Noise  
Low Current Consumption (Intermittent Monitoring)  
Status Display of Selected Pin at DOUT Pin  
(Note 1) Grade 1  
Package  
HTQFP64BV  
(64 pin QFP)  
W(Typ) x D(Typ) x H(Max)  
12.00 mm x 12.00 mm x 1.00 mm  
Application  
Engine Control Module  
Key Specifications  
Low-voltage Operating Range:  
Fully Operational Voltage Range:  
Input Voltage on Switch Pin:  
3.9 V to 6.0 V  
6 V to 28 V  
-14 V to +40 V  
Selectable Wetting Current (Min):  
1 mA, 3 mA, 5 mA, 10 mA, 15 mA  
Typical Application Circuit  
DCDC  
VOUT1  
+B  
VPUA/VPUB  
VIN  
BD3381EKV-C  
+B'  
INZ0  
VPUB  
VPUA/+B'  
VPUA  
VPUA/VPUB  
VPUA  
INZ11  
VOUT2  
MCU  
WATCHDOG  
RESET  
INA0  
INA9  
INTB  
INTB  
SI  
SI  
SCLK  
CSB  
VIN  
SCLK  
CS  
INB0  
SO  
IO  
SO  
INB10  
DOUT  
REF5  
VDDL  
VDDI  
TEST  
GND  
Figure 1. Typical Application Circuit  
〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays  
www.rohm.com  
© 2018 ROHM Co., Ltd. All rights reserved.  
TSZ22111 • 14 • 001  
TSZ02201-0E3E0H700780-1-2  
09.Aug.2018 Rev.001  
1/78  
 
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