ST's L9952GXP is a power management IC with advanced contact monitoring and peripheral functions and two low dropout regulators. It uses a standard 24-bit SPI to control the operating mode and provides diagnostics. The L9952GXP has a window. Watchdog and fail-safe output and interrupt output, LIN 2.1 compatible transceiver. The L9952GXP also integrates 5 high-side drivers, 2 relay drivers, and short-circuit protection with temperature alarm and thermal shutdown. Integrates two op amps for ground current detection. The L9952GXP is mainly used in automotive ECUs such as door zones and body control modules. This article introduces the main features of the L9952GXP, block diagrams and standard system configuration diagrams, and the door module segmentation block diagram. This article refers to the address: http:// The L9952GXP is a power management system IC containing two low drop regulators with advanced contact monitoring and additional peripheral functions. The integrated standard serial peripheral interface (SPI) controls all L9952GXP operation modes and provides driver diagnostic functions. Main features of L9952GXP: ■Two 5V low-drop voltage regulators (250mA, 100mA continuous mode) ■Low stand-by current: VBAT stby, 7μA; , V1 stby, 45μA, (75μA in cycl. sense) ■Window watchdog and fail-safe output ■Interrupt output ■Wake-up logic with cyclic contact monitoring ■LIN 2.1 compliant (SAEJ2602 compatible) transceiver ■24 bit SPI interface for mode control and diagnostic ■Output drivers ■4 High side drivers for eg LED or HALL (RDSon, typ = 7.) ■1 High side driver Out_HS ( RDSon, typ = 1.) ■2 Relay drivers ( RDSon, typ = 2.) ■Outputs are short circuit protected ■2 Op amps for current sensing in GND return lines ■Temperature warning and thermal shutdown L9952GXP application: ■Automotive ECU's such as door zone and body control modules. Figure 1. Block diagram of the L9952GXP (1) Figure 2. Internal block diagram of the L9952GXP (2) Figure 3. L9952GXP standard system configuration diagram Figure 4. Block diagram of the L9952GXP door module division
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