MC34984CHFK

Freescale Semiconductor Advance Information Document Number: MC34984 Rev. 1.0, 9/2014 Dual Intelligent High-current Self-protected Silicon High-side Switch (4.0 mOhm 34984 The 34984 is a dual self-protected 4.0 mOhm switch used to replace electromechanical relays, fuses, and discrete devices in power management applications. The 34984 is designed for harsh environments, and it includes self-recovery features. The device is suitable for loads with high inrush current, as well as motors and all types of resistive and inductive loads. Programming, control and diagnostics are implemented via the serial peripheral interface (SPI). A dedicated parallel input is available for alternate and pulsewidth modulation (PWM) control of each output. SPI-programmable fault trip thresholds allow the device to be adjusted for optimal performance in the application. The 34984 is packaged in a power-enhanced 12 x 12 mm nonleaded PQFN package with exposed tabs and powered by SMARTMOS technology. HIGH-SIDE SWITCH BOTTOM VIEW FK SUFFIX 98ARL10521D 16-PIN PQFN Features • • • • Dual 4.0 m max. high-side switch with parallel input or SPI control 6.0 V to 27 V operating voltage with standby currents < 5.0 A Output current monitoring with two SPI-selectable current ratios SPI control of overcurrent limit, overcurrent fault blanking time, output OFF open load detection, output ON/OFF control, watchdog timeout, slew-rates, and fault status reporting • SPI status reporting of overcurrent, open and shorted loads, overtemperature, undervoltage and overvoltage shutdown, fail-safe pin status, and program status • Enhanced -16 V reverse polarity VPWR protection VDD VDD Applications • • • • VDD Low-voltage factory automation DC motor or solenoid Resistive and inductive loads Low-voltage industrial lighting VPWR 34984 VDD I/O FS I/O WAKE SO SI SCLK MCU GND HS1 SCLK CS CS SI SO I/O RST I/O INO I/O IN1 A/D VPWR HS0 LOAD CSNS FSI GND Figure 1. 34984 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2014. All rights reserved. LOAD ORDERABLE PARTS ORDERABLE PARTS Table 1. Orderable Part Variations Temperature Range (TA) Part Number MC34984CHFK(1) -40 °C to 125 °C Package 16 PQFN Notes 1. To order parts in Tape & Reel, add the R2 suffix to the part number. 34984 2 Analog Integrated Circuit Device Data Freescale Semiconductor INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM VPWR VDD Internal Regulator IUP VIC Overvoltage Protection CS Programmable Switch Delay 0 –525 ms SO SPI 3.0 MHz Selectable Slew Rate Gate Drive HS0 Selectable Overcurrent High Detection 100A or 75A SI SCLK FS IN[0:1] RST WAKE Logic Selectable Overcurrent Low Detection Blanking Time 0.15–155 ms Selectable Overcurrent Low Detection 7.5 –25 A Open Load Detection IDWN Overtemperature Detection RDWN HS0 HS1 Programmable Watchdog 310–2500 ms HS1 VIC IUP Selectable Output Current Recopy 1/20500 or 1/41000 FSI GND CSNS Figure 2. 34984 Simplified Internal Block Diagram 34984 Analog Integrated Circuit Device Data Freescale Semiconductor 3 PIN CONNECTIONS PIN CONNECTIONS 4 3 2 CSNS RST WAKE 6 5 FS FSI 7 IN0 CS SI SCLK VDD SO IN1 12 11 10 9 8 1 13 GND TRANSPARENT TOP VIEW 14 VPWR 15 HS1 16 HS0 Figure 3. 34984 Pin Connections (Transparent Top View) Functional descriptions of many of these pins can be found in the Functional Pin Description section beginning on page 16. Table 2. Pin Definitions Pin Pin Name Pin Function Formal Name Definition 1 CSNS Output Output Current Monitoring This pin is used to output a current proportional to the designated HS0-1 output. 2 WAKE Input Wake 3 RST Input Reset (Active Low) 4 IN0 Input Direct Input 0 5 FS Output Fault Status (Active Low) This is an open drain configured output requiring an external pull-up resistor to VDD for fault reporting. 6 FSI Input Fail-safe Input The value of the resistance connected between this pin and ground determines the state of the outputs after a watchdog timeout occurs. 7 CS Input Chip Select (Active Low) 8 SCLK Input Serial Clock This input pin is connected to the MCU providing the required bit shift clock for SPI communication. 9 SI Input Serial Input This is a command data input pin connected to the SPI Serial Data Output of the MCU or to the SO pin of the previous device of a daisy chain of devices. 10 VDD Input Digital Drain Voltage (Power) 11 SO Output Serial Output This output pin is connected to the SPI serial data input pin of the MCU or to the SI pin of the next device of a daisy chain of devices. 12 IN1 Input Direct Input 1 This input pin is used to directly control the output HS1. 13 GND Ground Ground 14 VPWR Input Positive Power Supply This pin is used to input a Logic [1] signal so as to enable the watchdog timer function. This input pin is used to initialize the device configuration and fault registers, as well as place the device in a low current Sleep mode. This input pin is used to directly control the output HS0. This input pin is connected to a chip select output of a master microcontroller (MCU). This is an external voltage input pin used to supply power to the SPI circuit. This pin is the ground for the logic and analog circuitry of the device. This pin connects to the positive power supply and is the source input of operational power for the device. 34984 4 Analog Integrated Circuit Device Data Freescale Semiconductor PIN CONNECTIONS Table 2. Pin Definitions (continued) Pin Pin Name Pin Function Formal Name 15 HS1 Output High-side Output 1 Protected 4.0 m high-side power output to the load. 16 HS0 Output High-side Output 0 Protected 4.0 m high-side power output to the load. Definition 34984 Analog Integrated Circuit Device Data Freescale Semiconductor 5 ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 3. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Symbol Rating Value Unit Notes Operating Voltage Range Steady-state -16 to 41 V VDD VDD Supply Voltage -0.3 to 5.5 V VIN[0:1], RST, FSI, CSNS, SI, SCLK, Input/Output Voltage - 0.3 to 7.0 V (2) - 0.3 to VDD + 0.3 V (2) ELECTRICAL RATINGS VPWR CS, FS VSO SO Output Voltage ICL(WAKE) WAKE Input Clamp Current 2.5 mA ICL(CSNS) CSNS Input Clamp Current 10 mA 41 -15 V 30 A (3) 0.75 0.5 J (4) V (5) VHS Output Voltage Positive Negative IHS[0:1] Output Current ECL[0:1] Output Clamp Energy 34984B 34984C VESD1 VESD3 ESD Voltage Human Body Model (HBM) Charge Device Model (CDM) Corner Pins (1, 12, 15, 16) All Other Pins (2, 11, 13, 14) ± 2000 ±750 ±500 Notes 2. Exceeding this voltage limit may cause permanent damage to the device. 3. Continuous high-side output current rating so long as maximum junction temperature is not exceeded. Calculation of maximum output current using package thermal resistance is required. 4. Active clamp energy using single-pulse method (L = 16 mH, RL = 0,VPWR = 12 V, TJ = 150 °C). 5. ESD1 testing is performed in accordance with the Human Body Model (HBM) (CZAP = 100 pF, RZAP = 1500 ESD3 testing is performed in accordance with the Charge Device Model (CDM), Robotic (CZAP = 4.0 pF). 34984 6 Analog Integrated Circuit Device Data Freescale Semiconductor ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 3. Maximum Ratings (continued) All voltages are with respect to ground unless otherwise noted. Symbol Rating Value Unit Notes Operating Temperature Ambient Junction - 40 to 125 - 40 to 150 C TSTG Storage Temperature - 55 to 150 C RJC RJA Thermal Resistance Junction-to-Case Junction-to-Ambient