L99ASC03 STMicroelectronics

L99ASC03 Brushless / sensorless 3-phase motor pre-driver for automotive applications Datasheet - production data TQFP48 7 x 7 x 1 mm with Exposed Pad (4.5 x 4.5 mm) package Applications Mechatronic three-phase motor application such as engine cooling fans, fuel pumps, water TQFP48-EP pumps, oil pumps Description Features The L99ASC03 is a multifunctional system IC Automotive qualified designed for three-phase motor control 5 V low-drop voltage regulator (200 mA applications. continuous mode) The device features a voltage regulator to supply Very low current consumption in standby mode an external microcontroller and an operation (typ. 15 A) amplifier for motor current sensing. It is designed ST SPI interface for control and diagnostics to control six external N-channel MOSFETs in bridge configuration to Window watchdog and fail-safe functionality drive three-phase motors in automotive Two separate power supply pins applications. All gate driver outputs are controlled Three half-bridge drivers to control external by separate inputs. MOSFETs (configurable by SPI) The integrated Serial Peripheral Interface (SPI) Full drive of external MOSFETs down to 6 V makes it possible to adjust device parameters, input voltage control all operating modes and read out Input pin for each gate driver (with cross- diagnostic information. current protection) Two-stage charge pump supporting 100% duty cycle PWM operation up to 80 kHz (not restricted) Current-sense amplifier (configurable by SPI) Disable input to turn off gate driver outputs Analog multiplexer output to monitor external power supply voltages and internal junction Table 1. Device summary temperature Order codes Advanced BEMF detection IP Package Overcurrent protection (programmable) Tube Tape and real Drain-source monitoring and open-load TQFP48-EP L99ASC03 L99ASC03TR detection August 2015 DocID023504 Rev 7 1/73 This is information on a product in full production. www.st.comContents L99ASC03 Contents 1 Block diagram and pin descriptions 7 2 Device description . 10 2.1 Supply pins (V , V , V ) 10 S SREG SMS 2.1.1 V , V and V overvoltage warning 10 S SREG SMS 2.1.2 V , V and V overvoltage . 10 S SREG SMS 2.1.3 V , V and V undervoltage 10 S SREG SMS 2.2 V (5V) voltage regulator 10 DD 2.3 NRES reset output .11 2.4 Watchdog . 12 2.5 Device operating modes 14 2.5.1 Active Mode 14 2.5.2 Flash Mode 14 2.5.3 VDD Standby Mode 15 2.5.4 VBAT Standby Mode . 15 2.5.5 Device mode state diagram 16 2.5.6 Functional overview 17 2.6 DIS pin . 17 2.7 INH pin . 17 2.8 Thermal warning and thermal shutdown . 17 2.8.1 Normal mode: TEMPM = 0 (TW1, TSD1, TSD2) . 18 2.8.2 Warning mode: TEMP = 1 (TW1, TW2, TSD2) 18 2.9 Wake-up events 20 2.10 Charge pump 20 2.11 Gate drivers . 20 2.12 Drain-source monitoring 22 2.12.1 Drain-source monitoring in ON state (short-circuit detection) 22 2.12.2 Drain-source monitoring in OFF state (open-load / short-circuit detection) 22 2.13 Current-sense amplifier 23 2.14 Overcurrent detection 23 2.15 BEMF module 23 2.15.1 BEMF comparator . 23 2/73 DocID023504 Rev 7