Quad channel high side driver for automotive applications
Document overview
- Manufacturer or author: STMICROELECTRONICS
- PDF pages: 30
Technical content
Datasheet sections
- 1 Block diagram and pin co nfiguration
- 2 Electrical specifications
- 2.1 Absolute maximum ratings
- 2.2 Thermal data
- 2.3 Electrical characteristics
- 2.4 Electrical characteristics curves
- 3 Application information
- 3.1 GND protection network against reverse battery
- 3.1.1 Solution 1: resistor in the ground line (RGND only)
- 3.1.2 Solution 2: a diode (DGND) in the ground line
- 3.2 Load dump protection
- 3.3 Microcontroller I/Os protection
- 3.4 Open-load detection in off-state
- 4 Package and PC board thermal da ta
- 4.1 PowerSSO-24 thermal data
- 5 Package and packing information
- 5.1 ECOPACK ® packages
- 5.2 PowerSSO-24™ mechanical data
- 5.3 Packing information
- 6 Revision history
Features
■ General features – Inrush current active management by power limitation – Very low standby current – 3.0 V CMOS compatible input – Optimized electromagnetic emission – Very low electromag netic susceptibility – In compliance with the 2002/95/EC European directive ■ Diagnostic functions – Open drain status output – On-state open-load detection – Off-state open-load detection – Thermal shutdown indication ■ Protection – Undervoltage shutdown – Overvoltage clamp – Output stuck to V CC detection – Load current limitation – Self limiting of fast thermal transients – Protection against loss of ground and loss of V CC – Thermal shut down – Reverse battery protection (see Application schematic on page 18 – Electrostatic discharge protection
Applications
■ All types of resistive, inductive and capacitive loads
Description
The VNQ5160K-E is a monolithic device made using STMicroelectronics VIPower™ M0-5 technology. It is intended for driving resistive or inductive loads with one side connected to ground. Active V CC pin voltage clamp protects the device against low energy spikes (see ISO7637 transient compatibility table). The device detects open-load condition in both on and off states, when STAT_DIS is left open or driven low. Output shorted to V CC is detected in the off-state. When STAT_DIS is driven high, the STATUS pin is in a high impedance condition. Output current limitation protects the device in overload condition. In the case of long duration overload, the device limits the dissipated power to a safe level up to thermal shutdown intervention. Thermal shutdown with automatic restart allows the device to recover normal operation as soon as a fault condition disappears. Max transient supply voltage V CC 41V Operating voltage range V CC 4.5 to 36 V Max on-state resistance (per ch.) R ON 160 m Current limitation (typ) I LIMH 5.4 A Off-state supply current I S 2 A(1) 1. Typical value with all loads connected PowerSSO-24 Table 1. Device summary
Table 8. Status pin (V
1 Block diagram and pin configuration
Figure 1. Block diagram Table 2. Pin functions
Figure 2. Configurati on diagram (top view) Table 3. Suggested connections for unused and not connected pins
2 Electrical specifications
Figure 3. Current and voltage conventions
2.1 Absolute maximum ratings
Table 4. Absolute maximum ratings
2.2 Thermal data
2.3 Electrical characteristics
Table 4. Absolute maximum ratings (continued) Table 5. Thermal data Table 6. Power section
- PowerMOS leakage included.
- To ensure long term reliability under heavy overload or short circuit conditions, protection and related
Table 10. Open-load detection Table 11. Logic input Table 9. Protection (1) (continued)
Figure 6. Switching characteristics Table 12. Truth table
- If the V SD is high, the STATUS pin is in a high impedance.
- The STATUS pin is low with a delay equal to t DSTKON after INPUT falling edge.
- The STATUS pin becomes hi gh with a delay equal to tPOL after INPUT falling edge.
Table 13. Electrical transient requirements (part 1/3)
- Valid in case of external load dump clamp: 40V maximum referred to ground.
Table 14. Electrical transient requirements (part 2/3)
- The above test levels must be considered referred to V CC = 13.5V except for pulse 5b
- Valid in case of external load dump clamp: 40V maximum referred to ground.
Table 15. Electrical transient requirements (part 3/3) C All functions of the device are performed as designed after exposure to disturbance. disturbance and cannot be returned to proper operation without replacing the device.
2.4 Electrical char acteristics curves
Figure 7. Off-state output current Figure 8. High level input current Figure 9. Input clamp voltage Figure 10. Input low level voltage Figure 11. Input high level voltage Figure 12. Input hysteresis voltage
Figure 25. STAT_DIS clamp voltage Figure 26. Low level STAT_DIS voltage
3 Application information
Figure 27. Application schematic Note: Channels 2, 3 and 4 have the same internal circuit as channel 1.
3.1 GND protection network against reverse battery
3.1.1 Solution 1: resist or in the ground line (RGND only). This solution can be used with any type of load. The following is an indication on how to dimension the RGND resistor. maximum rating section of the device datasheet. maximum on-state currents of the different devices. high side drivers sharing the same RGND.
If the calculated power dissipation leads to a large resistor or several devices have to share the same resistor then ST suggests that Solution 2 is used(see below). 3.1.2 Solution 2: a diode (D GND) in the ground line. A resistor (RGND=1kshould be inserted in parallel with DGND if the device drives an inductive load. This small signal diode can be safely shared amongst several different HSDs. Also in this case, the presence of the ground network will produce a shift (~600mV) in the input threshold and in the status output values if the microprocessor ground is not common with the device ground. This shift will not vary if more than one HSD shares the same diode/resistor network.
3.2 Load dump protection
Dld is necessary (Voltage Transient Suppressor) if the load dump peak voltage exceeds to VCC max DC rating. The same applies if the device is subject to transients on the VCC line that are greater than the ones shown in the ISO T/R 7637/1 table.
3.3 Microcontroller I/Os protection
If a ground protection network is used and negative transients are present on the VCC line, the control pins will be pulled negative. ST suggests the insertion of resistors (Rprot) in the lines to prevent the C I/Os pins from latching up. The values of these resistors are a compromise between the leakage current of C and the current required by the HSD I/Os (input levels compatibility) with the latch-up limit of the C I/Os. -VCCpeak/Ilatchup Rprot (VOHC-VIH-VGND) / IIHmax Calculation example: For VCCpeak= - 100V and Ilatchup 20mA; VOHC 4.5V 5k Rprot 65k. Recommended Rprot value is 10k
3.4 Open-load detecti on in off-state
Off-state open-load detection requires an external pull-up resistor (RPU) connected between the OUTPUT pin and a positive supply voltage (VPU) like the +5V line used to supply the microprocessor. The external resistor has to be selected according to the following requirements:
- No false open-load indication when load is connected: in this case we have to avoid
VOUT=(VPU/(RL+RPU))RL<VOlmin.
- No misdetection when the load is disconnected: in this case the V OUT has to be higher
Figure 28. Open-load detection in off-state
Figure 29. Waveforms
Figure 30. Maximum turn-off current versus inductance (for each channel) must not exceed the temperature specified above for curves A and B.
4 Package and PC board thermal data
4.1 PowerSSO-24 thermal data
Figure 31. PowerSSO-24 PC board Figure 32. Rthj-amb vs PCB copper area in open box free air condition (one channel ON)
Table 16. Thermal parameters
5 Package and packing information
5.1 ECOPACK ® packages
specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
5.2 PowerSSO-24™ mechanical data
Figure 35. PowerSSO-24™ package dimensions
Table 17. PowerSSO-24™ mechanical data
5.3 Packing information
Figure 36. PowerSSO-24 tube shipment (no suffix) Figure 37. Tape and reel shipment (suffix “TR”)
6 Revision history
Table 18. Document revision history 8-Jan-2004 1 Initial release. Reformatted and restructured. Contents, List of tables and List of figures added. Section 5.1: ECOPACK® packages information added. Table 4: Absolute maximum ratings: EMAX entries updated. Updated Figure 35: PowerSSO-24™ package dimensions .