Double channel high-side driver with analog current sense for automotive applications

Document overview

  • Manufacturer or author: STMICROELECTRONICS
  • PDF pages: 37

Technical content

Datasheet sections

  • 1 Block diagram and pin description
  • 2 Electrical specifications
  • 2.1 Absolute maximum ratings
  • 2.2 Thermal data
  • 2.3 Electrical characteristics
  • 2.4 Waveforms
  • 2.5 Electrical characteristics curves
  • 3 Application information
  • 3.1 Load dump protection
  • 3.2 MCU I/Os protection
  • 3.3 Current sense and diagnostic
  • 3.3.1 Short to VCC and off-state open-load detection
  • 4 Package and PCB thermal data
  • 4.1 PowerSO-16 thermal data
  • 5 Package information
  • 5.1 ECOPACK ® packages
  • 5.2 PowerSO-16 mechanical data
  • 5.3 Packing information
  • 6 Order codes
  • 7 Revision history

Features

  • General – Very low standby current – 3.0 V CMOS compatible inputs – Optimized electromagnetic emissions – Very low electromagnetic susceptibility – Compliance with European directive 2002/95/EC – Very low current sense leakage
  • Diagnostic functions – Proportional load current sense – High current sense precision for wide currents range – Current sense disable – Off-state openload detection – Output short to V CC detection – Overload and short to ground (power limitation) indication – Thermal shutdown indication
  • Protection – Undervoltage shutdown – Overvoltage clamp – Load current limitation – Self limiting of fast thermal transients – Protection against loss of ground and loss of V CC – Overtemperature shutdown with auto restart (thermal shutdown) – Inrush current active management by power limitation – Reverse battery protected with self switch of the PowerMOS – Electrostatic discharge protection

Applications

  • All types of resistive, inductive and capacitive loads

Description

The VND5E006ASP-E is a double channel high-side driver manufactured using ST proprietary VIPower™ M0-5 technology and housed in PowerSO-16 package. The device is designed to drive 12 V automotive grounded loads, and to provide protection and diagnostics. They also implement a 3 V and 5 V CMOS compatible interface for the use with any microcontroller. The device integrates advanced protective functions such as load current limitation, inrush and overload active management by power limitation, overtemperature shut-off with auto restart and overvoltage active clamp. A dedicated analog current sense pin is associated with every output channel providing enhanced diagnostic functions including fast detection of overload and short-circuit to ground through power limitation indication, overtemperature indication, short- circuit to V CC diagnosis and on-state and off-state open-load detection. The current sensing and diagnostic feedback of the whole device can be disabled by pulling the CS_DIS pin high to share the external sense resistor with similar devices. Max transient supply voltage V CC 41 V Operating voltage range V CC 4.5 to 28 V Typ on-state resistance (per ch.) R ON 5 mΩ Current limitation (typ) I LIMH 100 A Off-state supply current I S 2 µA(1) 1. Typical value with all loads connected. PowerSO-16

Table 6. Switching (V

1 Block diagram and pin description

Figure 1. Block diagram Table 1. Pin function CSn Analog current sense pin, delivers a current proportional to the load current. CS_DIS Active high CMOS compatible pin, to disable the current sense pin.

Figure 2. Configuration diagram (top view) Table 2. Suggested connections for unused and not connected pins

2 Electrical specifications

Figure 3. Current and voltage conventions

2.1 Absolute maximum ratings

and other relevant quality documents. Table 3. Absolute maximum ratings

2.2 Thermal data

Table 3. Absolute maximum ratings (continued) Table 4. Thermal data

2.3 Electrical characteristics

8 V < VCC < 28 V; -40 °C < Tj < 150 °C, unless otherwise specified. Table 5. Power section

  1. PowerMOS leakage included.

Table 6. Switching (VCC = 13 V; Tj = 25 °C)

Table 7. Logic inputs Table 8. Protections and diagnostics(1)

  1. To ensure long term reliability under heavy overload or short circuit conditions, protection and related

abnormal conditions, this software must limit the duration and number of activation cycles.

5 V < VCC < 24 V 140 A

Table 9. Current sense (8 V < VCC < 18 V)

  1. Parameter guaranteed by design; it is not tested.
  2. Fault conditions includes: power limitation, overtemperature and open-load off-state detection.

Table 10. Open-load detection (8 V < VCC < 18 V) Table 9. Current sense (8 V < VCC < 18 V) (continued)

Table 11. Truth table

  1. If the V CSD is high, the SENSE output is at a high impedance, its potential depends on leakage currents

Table 12. Electrical transient requirements (part 1/3)

  1. The above test levels must be considered referred to V CC = 13.5 V except for pulse 5b.
  2. Valid in case of external load dump clamp: 40V maximum referred to ground. The protection strategy

along the time and to transfer a part of it to the load. Table 13. Electrical transient requirements (part 2/3)

  1. The above test levels must be considered referred to V CC = 13.5 V except for pulse 5b.
  2. Valid in case of external load dump clamp: 40V maximum referred to ground. The protection strategy

along the time and to transfer a part of it to the load.

  1. Suppressed load dump (pulse 5b) is withstood wi th a minimum load connected as specified in

Table 3: Absolute maximum ratings. Table 14. Electrical transient requirements (part 3/3) C All functions of the device are performed as designed after exposure to disturbance.

2.4 Waveforms

Figure 11. Normal operation Figure 12. Overload or short to GND

2.5 Electrical characteristics curves

Figure 17. Off-state output current Figure 18. High level input current Figure 19. Input clamp voltage Figure 20. Input high level voltage Figure 21. Input low level voltage Figure 22. Input hysteresis voltage

3 Application information

Figure 32. Application schematic Note: Channel 2 has the same internal circuit as channel 1.

3.1 Load dump protection

that are greater than the ones shown in the ISO 7637-2 2004 (E) table.

3.2 MCU I/Os protection

microcontroller I/O pins from latching-up. Recommended values: Rprot = 10 kΩ, CEXT = 10 nF.

3.3 Current sense and diagnostic

  • Current mirror of the load current in normal operation, delivering a current proportional to the load one according to a known ratio KX. The current ISENSE can be easily converted to a voltage VSENSE by means of an external resistor RSENSE. Linearity between IOUT and VSENSE is ensured up to 5V minimum (see parameter VSENSE in Table 9: Current sense (8 V < VCC < 18 V)). The current sense accuracy depends on the output current (refer to current sense electrical characteristics Table 9: Current sense (8 V < VCC < 18 V)).
  • Diagnostic flag in fault conditions, delivering a fixed voltage V SENSEH up to a maximum current ISENSEH in case of the following fault conditions (refer to Truth table): – Power limitation activation – Overtemperature – Short to V CC in off-state – Open-load in off-state with additional external components. A logic level high on CS_DIS pin sets at the same time all the current sense pins of the device in a high impedance state, thus disabling the current monitoring and diagnostic detection. This feature allows multiplexing of the microcontroller analog inputs by sharing of sense resistance and ADC line among different devices.

Figure 33. Current sense and diagnostic

3.3.1 Short to V CC and off-state open-load detection

A short circuit between VCC and output is indicated by the relevant current sense pin set to VSENSEH during the device off-state. Small or no current is delivered by the current sense during the on-state depending on the nature of the short circuit. Off-state open-load with external circuitry Detection of an open-load in off mode requires an external pull-up resistor RPU connecting the output to a positive supply voltage VPU. It is preferable VPU to be switched off during the module standby mode in order to avoid the overall standby current consumption to increase in normal conditions, i.e. when load is connected. For proper open-load detection in off-state, the external pull-up resistor must be selected according to the following formula: For the values of VOLmin,VOLmax, and IL(off2) see Table 10: Open-load detection (8 V < VCC < 18 V). VVRR IRRVRV OL PDPU offLPDPUPUPD ONupPullOUT 4max )2( _ =>+

Figure 34. Maximum turn-off current versus inductance Note: Values are generated with R L = 0 Ω. must not exceed the temperature specified above for curves A and B.

4 Package and PCB thermal data

4.1 PowerSO-16 thermal data

Figure 35. PowerSO-16 PC board(1)

  1. Layout condition of R th and Zth measurements (PCB: Double layer, Thermal Vias, FR4 area= 77mm x

Figure 36. Rthj-amb vs PCB copper area in open box free air condition (one channel

Table 15. Thermal parameters

5 Package information

5.1 ECOPACK ® packages

specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.

5.2 PowerSO-16 mechanical data

Figure 39. PowerSO-16 package dimensions

Table 16. PowerSO-16 mechanical data

5.3 Packing information

Figure 40. PowerSO-16 tube shipment (no suffix) Figure 41. PowerSO-16 tape and reel shipment (suffix “TR”)

Figure 42. PowerSO-16 suggested pad layout

6 Order codes

Table 17. Device summary

7 Revision history

Table 18. Document revision history 18-Apr-2010 1 Initial release. 02-Jul-2010 2 Updated Features list. 21-Jul-2010 3 Updated Table 9: Current sense (8 V < VCC < 18 V). 19-Sep-2013 5 Updated Disclaimer.