VNH7070BAS STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 38
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
- 3 Application information
- 3.1 Reverse battery protection
- 3.2 OFF-state open-load detection – External circuitry dimensioning
- 3.3 Immunity against transient electrical disturbances
- 3.4 Device configurations
- 4 Package and PCB thermal data
- 4.1 SO16-N thermal data
- 4.2 Package thermal data
- 4.2.1 Thermal characterization in steady state conditions
- 4.2.2 Thermal characterization during transients
- 5 Package and packing information
- 5.1 SO-16N mechanical data
- 5.2 SO-16N packing information
- 5.3 SO-16N marking information
- 6 Revision history
Features
AEC-Q100 qualified Output current: 15 A 3 V CMOS-compatible inputs Undervoltage shutdown Overvoltage clamp Thermal shutdown Cross-conduction protection Current and power limitation Very low standby power consumption Protection against loss of ground and loss of VCC PWM operation up to 20 kHz CS diagnostic functions – Analog motor current feedback – Output short to ground detection – Thermal shutdown indication – OFF-state open-load detection – Output short to V CC detection Output protected against short to ground and short to VCC Standby Mode Half Bridge Operation Package: ECOPACK®
Description
The device is a full bridge motor driver intended for a wide range of automotive applications. The device incorporates a dual monolithic high-side driver and two low-side switches. Both switches are designed using STMicroelectronics’ well known and proven proprietary VIPower ® M0-7 technology that allows to efficiently integrate on the same die a true Power MOSFET with an intelligent signal/protection circuitry. The three dies are assembled in SO-16N package on electrically isolated lead-frames. Moreover, its fully symmetrical mechanical design allows superior manufacturability at board level. The input signals IN A and INB can directly interface the microcontroller to select the motor direction and the brake condition. A SEL0 pin is available to address the information available on the CS to the microcontroller. The CS pin allows to monitor the motor current by delivering a current proportional to the motor current value. The PWM, up to 20 kHz, allows to control the speed of the motor in all possible conditions. In all cases, a low level state on the PWM pin turns off both the LS A and LSB switches. Type R DS(on) Iout VCCmax VNH7070BAS 70 mtyp per leg) 15 A 38 V SO-16N GAPGCFT00648 Table 1. Device summary
1 Block diagram and pin description
Figure 1. Block diagram Table 2. Block description low-side switches according to the truth table. Undervoltage Shuts down the device for battery voltage lower than 4 V. high voltage on the battery line. Ron for the leg of the bridge. Current limitation Limits the motor current in case of short circuit. degradation and to protect the die. and latches off the concerned Low side.
Figure 2. Configuration diagram (top view) safe range in case of short to ground condition. Table 3. Pin definitions and functions
11 PWM
13 CS Multiplexed analog sense output pin; it delivers a current proportional
to the motor current according to the leg selection.
14 SEL
delivered to the micro according to the operative truth table. Table 2. Block description (continued)
2 Electrical specifications
Figure 3. Current and voltage conventions
2.1 Absolute maximum ratings
extended periods may affect device reliability. Table 4. Absolute maximum ratings
2.2 Thermal data
Table 4. Absolute maximum ratings (continued) Table 5. Thermal data
- Device mounted on two-layers 2s0p PCB.
- Device mounted on four-layers 2s2p PCB.
2.3 Electrical characteristics
Table 6. Power section
- To power on the device from the standby, it is recommended to:
this avoids any over-stress on the device in case of existing short-to-battery.
Table 7. Logic inputs (INA, INB) (VCC = 7 V up to 28 V; -40 °C < Tj < 150 °C) Table 8. Switching (VCC = 13 V, RLOAD = 3.7 Ω)
- Parameter guaranteed by design and characterization; not subjected to production test.
Table 9. Protections and diagnostics (VCC = 7 V up to 18 V; -40 °C < Tj < 150 °C)
Figure 4. TDSTKON
9 V < VCC < 18 V;
- Analog sense current drift is deviation of factor K for a given device over (-40 °C to 150 °C and 9 V < VCC <
18 V) with respect to its value measured at Tj = 25 °C, VCC = 13 V.
- Parameter guaranteed by design and characterization; not subjected to production test.
Table 10. CS (7 V < VCC < 18 V) (continued)
Figure 11. OFF-state diagnostic delay time from rising edge of VOUT (tD_VOL)
detect a latched off channel. Table 11. Operative condition - truth table
0 Current Monitoring HSDB
0 On Off Off Off
0 Off Off On Off
1 Hi-Z Off On Off On
- Refer to Table 13: Off-state -truth table
- For IN A = INB = SEL0 = PWM = 0, the device enters in standby after TD_sdby
Table 12. On-state fault conditions- truth table
Table 13. Off-state -truth table
- The device enters standby mode after T D_sdby.
- To power on the device from the standby, it is recommended to toggle INA or INB from 0 to 1 first and then
PWM from 0 to 1 to avoid any over-stress on the device in case of short-to-battery.
2.4 Waveforms
Figure 12. Normal operative conditions Figure 13. OUT shorted to ground and short clearing
Figure 14. OUT shorted to Vcc and short clearing
3 Application information
the device in DC or PWM conditions. Figure 15. Application schematic with reverse battery protection connected to Vbatt Figure 16. Application schematic with reverse battery protection connected to GND
Figure 17. Suggested PCB layout
3.1 Reverse battery protection
CC line (approximately -1.5 V).
3.2 OFF-state open-load detection – External circuitry
output to a positive supply voltage VPU (VBatt).
standby current during he module standby mode. Rpull_up must be dimensioned to ensure that in normal operative conditions VOUT > VOLmax.
3.3 Immunity against transient electrical disturbances
The related function performance status classification is shown in Table 14. to normal operation after the test”. Table 14. ISO 7637-2 - electrical transient conduction along supply line
- U S is the peak amplitude as defined for each test pulse in ISO 7637-2:2011(E), chapter 5.6.
1 III -112 V 500 pulses 0,5 s 2ms, 10
3.4 Device configurations
Figure 18. Half-bridge configuration (case a) according to the operative truth table. Figure 19. Half-bridge configuration (case b)
- With 40 V external suppressor referred to ground (-40°C < T j < 150°C).
Figure 20. Multi-motors configuration read the diagnostic on the CS according to the operative truth table.
4 Package and PCB thermal data
4.1 SO16-N thermal data
Figure 21. PCB layout (top and bottom): footprint, 2+2+2 cm2, 8+8+8 cm2
Figure 22. PCB 4 layer 0.3 mm +/- 0.08 mm; Cu thickness on vias 0.025 mm.
4.2 Package thermal data
4.2.1 Thermal characterization in steady state conditions
Figure 23. Chipset configuration in steady state conditions
Figure 24. Auto and mutual Rthj-amb vs. PCB heat-sink area in open box free air
4.2.2 Thermal characterization during transients
Table 15. Thermal model for junction temperature calculation in steady-state
- RthAC + Tamb Pdchip1 • RthAB + Pdchip3
- RthBC + Tamb Pdchip1 • RthAC + Pdchip3
- RthC + Tamb ON ON OFF Pdchip1 • RthA + Pdchip2
- RthAB + Tamb Pdchip1 • RthAB + Pdchip2
- RthB + Tamb Pdchip1 • RthAC + Pdchip2
- RthBC + Tamb ON OFF OFF P dchip1 • RthA+ Tamb Pdchip1 • RthAB + Tamb Pdchip1 • RthAC + Tamb ON ON ON Pdchip1 • RthA + (Pdchip2 + Pdchip3) • RthAB + T amb Pdchip2 • RthB + Pdchip1 • RthAB + Pdchip3 • RthBC + Tamb Pdchip1 • RthAB + Pdchip2
- RthBC + Pdchip3 • RthC + Tamb ("1($'5 &: FP RI&X$UHD UHIHUWR3&%/D\\HUOD\\RXW 5WK$ 5WK% 5WK& 5WK$% 5WK$& 5WK%&
Figure 27. Electrical equivalent model Table 16. Thermal parameters
Table 16. Thermal parameters (continued)
5 Package and packing information
specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
5.1 SO-16N mechanical data
Figure 28. SO-16N package dimensions
5.2 SO-16N packing information
Figure 29. SO-16N reel 13” Table 17. SO-16N mechanical data
Figure 30. SO-16N rcarrier tape Table 18. Reel dimensions
- All dimensions are in mm.
Table 19. SO-16N carrier tape dimensions
Figure 31. SO-16N schematic drawing of leader and trailer tape
5.3 SO-16N marking information
Figure 32. SO-16N marking information Parts marked as ‘ES’ are not yet qualified and therefore not approved for use in production. Table 19. SO-16N carrier tape dimensions (continued)
6 Revision history
Table 20. Document revision history 23-Aug-2016 1 Initial release. Document status promoted from target specification to production data. – Table 16: Thermal parameters on page 31.