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TPIC44L03 Datasheet(PDF) 4 Page - Texas Instruments |
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TPIC44L03 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 20 page TPIC44L01, TPIC44L02, TPIC44L03 4-CHANNEL SERIAL AND PARALLEL LOW-SIDE PRE-FET DRIVER SLIS062A – NOVEMBER 1996 – REVISED SEPTEMBER 1997 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION CS 8 I Chip select. A high to low transition on CS enables SDO, latches fault data into the serial interface, and refreshes FLT. When CS is high, the fault registers can change fault status. On the falling edge of CS, fault data is latched into the serial output register and transferred using SDO and SCLK. On a low to high transition of CS, serial data is latched in to the output control register. DRAIN0 21 I DRAIN1 19 FET drain inputs. DRAIN0 through DRAIN3 are used for both open-load and short-circuit fault detection at the DRAIN2 16 g drain of the external FETs. They are also used for inductive transient protection. DRAIN3 14 FLT 1 I Fault flag. FLT is a logic level open-drain output that provides a real-time fault flag for shorted-load/ open-load/over-battery voltage/under-battery voltage faults. The device can be ORed with FLT terminals on other devices for interrupt handling. FLT requires an external pullup resistor. GATE0 20 O GATE1 18 Gate drive output. GATE0 through GATE3 outputs are derived from the VBAT supply voltage. Internal clamps GATE2 17 g BAT yg prevent voltages on these nodes from exceeding the VGS rating on most FETs. GATE3 15 GND 13 I Ground and substrate IN0 4 I IN1 5 Parallel gate driver. IN0 through IN3 are real-time controls for the gate predrive circuitry. They are CMOS IN2 6 gg g y y compatible with hysteresis. IN3 7 RESET 22 I Reset. A high-to-low transition of RESET clears all registers and flags. Gate outputs turn off and the FLT flag is cleared. SCLK 11 I Serial clock. SCLK clocks the shift register. Serial data is clocked into SDI and serial fault data is clocked out of SDO on the falling edge of the serial clock. SDI 10 I Serial data input. Output control data is clocked into the serial register through SDI. A 1 on SDI commands a particular gate output on and a 0 turns it off. SDO 9 O Serial data output. SDO is a 3-state output that transfers fault data to the controlling device. It also passes serial input data to the next stage for cascaded operation. SDO is taken to a high-impedance state when CS is in a high state. VBAT 24 I Battery supply voltage VCC 12 I Logic supply voltage VCOMPEN 2 I Fault reference voltage select. VCOMPEN selects the internally generated fault reference voltage (0) or an external fault reference (1) to be used in the shorted- and open-load fault detection circuitry. VCOMP 3 I Fault reference voltage. VCOMP provides an external fault reference voltage for the shorted-load and open-load fault detection circuitry. |
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