VN751S - STMicroelectronics, Inc.

November 2009 Doc ID 12320 Rev 7 1/17

VN751S

High side driver

Features

■CMOS compatible input

■Thermal shutdown

■Shorted load protection

■Undervoltage and overvoltage shutdown

■Protection against loss of ground

■Very low standby current

■Compliance to 61000-4-4 IEC test up to 4 kV

■Open drain status output

Description

The VN751S is a monolithic device designed in

STMicroelectronics VIPower M0-3 technology,

intended for driving any kind of load with one side

connected to ground. Active VCC pin voltage

clamp protects the device against low energy

spikes. Active current limitation combined with

thermal shutdown and automatic restart protect

the device against overload. Device automatically

turns off in case of ground pin disconnection. This

device is especially suitable for industrial

applications in conformity with IEC 61131-2

programmable controllers international standard.

Type RDS(on) Iout VCC

VN751S 60 mΩ2.5 A 36 V

SO-8

Figure 1. Block diagram

UNDERVOLTAGE

OVERTEMPERATURE

GND

INPUT

OUTPUT

OVERVOLTAGE

CURRENT

LIMITER

LOGIC

DRIVER

Power

CLAMP

CLAMP DETECTION

DETECTION

STATUS

www.st.com

Contents VN751S
2/17 Doc ID 12320 Rev 7
Contents
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Waveforms and truth table  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Test circuit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Application schematic   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Reverse polarity protection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Package mechanical data  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Order code  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Revision history   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

VN751S Maximum ratings

Doc ID 12320 Rev 7 3/17

1 Maximum ratings

Table 1. Absolute maximum rating

Symbol Parameter Value Unit

VCC DC supply voltage (overvoltage protected) 45 V

- VCC Reverse DC supply voltage -0.3 V

- IGND DC reverse ground pin current -200 mA

IOUT DC output current Internally limited A

- IOUT Reverse DC output current -5 A

IIN DC input current +/- 10 mA

ISTAT DC status current +/- 10 mA

VESD Electrostatic discharge (R = 1.5 kΩ; C = 100 pF) 5000 V

Ptot Power dissipation TC = 25 °C Internally limited W

TJJunction operating temperature Internally limited °C

TcCase operating temperature - 40 to 150 °C

Tstg Storage temperature - 55 to 150 °C

EAS Single-pulse avalanche energy 0.8 J

Table 2. Thermal data

Symbol Parameter Value Unit

RthJA Thermal resistance junction-ambient Max 93(1)

1. When mounted on a standard single-sided FR-4 board with 0.5 cm2 of Cu (at least 35μm) thick connected

to all VCC pins. Horizontal mounting and no artificial air flow.

°C/W

82(2)

2. When mounted on a standard single-sided FR-4 board with 2 cm2 of Cu (at least 35μm) thick connected to

all VCC pins. Horizontal mounting and no artificial air flow.

°C/W

RthJC Thermal resistance junction-case Max 15 °C/W

Pin connections VN751S

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2 Pin connections

Figure 2. Connection diagram (top view)

Figure 3. Current and voltage conventions

VN751S Electrical characteristics

Doc ID 12320 Rev 7 5/17

3 Electrical characteristics

8 V < VCC < 36 V; -40 °C < TJ < 125 °C, unless otherwise specified

Table 3. Power

Symbol Parameter Test conditions Min Typ Max Unit

VCC Operating supply

voltage 5.5 36 V

VUSD Undervoltage

shut-down 345.5V

VOV Overvoltage

shut-down 36 V

RON On state resistance IOUT = 2 A; TJ = 25 °C

IOUT = 2 A

180

mΩ

ISSupply current

Off state; VCC = 24 V; TCASE =25 °C

On state; VCC = 24 V

On state; VCC = 24 V;TCASE =100 °C

1.5

1.8

μA

IL(off) Off state output current VIN = VOUT = 0 V 010μA

Table 4. Switching (VCC = 24 V)

Symbol Parameter Test conditions Min Typ Max Unit

td(on) Turn-on delay time RL = 12 Ω from VIN rising edge to

VOUT = 2.4 V 12 μs

td(off) Turn-off delay time RL = 12 Ω from VIN falling edge to

VOUT = 21.6 V 35 μs

dVOUT/dt(on) Turn -on voltage slope RL = 12Ω from VOUT = 2.4 V to

VOUT = 19.2 V 0.80 V/μs

dVOUT/dt(off) Turn -off voltage slope RL = 12 Ω from VOUT = 21.6 V to

VOUT = 2.4 V 0.30 V/μs

Electrical characteristics VN751S

6/17 Doc ID 12320 Rev 7

Table 5. Input pin

Symbol Parameter Test conditions Min Typ Max Unit

VIL Input low level 1.25 V

IIL Low level input

current VIN = 1.25 V 1μA

VIH Input high level 3.25 V

IIH High level input

current VIN = 3.25 V 10 μA

Vhyst Input hysteresis

voltage 0.5 V

IIN Input current VIN = VCC = 5 V 10 μA

VICL Input clamp voltage IIN = 1 mA

IIN = -1 mA

6 6.8

-0.7

8 V

Table 6. Status pin

Symbol Parameter Test conditions Min Typ Max Unit

VSTAT Status low output

voltage ISTAT = 1.6 mA 0.5 V

ILSTAT Status leakage

current Normal operation; VSTAT = 5 V 10 µA

CSTAT Status pin input

capacitance Normal operation; VSTAT = 5 V 100 pF

VSCL Status clamp voltage ISTAT = 1 mA;

ISTAT =-1 mA

6 6.8

-0.7

8 V

Table 7. Protections

Symbol Parameter Test conditions Min Typ Max Unit

TTSD Shut-down

temperature 150 175 200 °C

TRReset temperature 135 °C

Thyst Thermal hysteresis 7 20 °C

Ilim Current limitation VCC = 24 V, RLOAD = 10 mΩ,

t = 0.4 ms 2.7 6.0 A

Vdemag

Turn-off output

clamp

voltage

RL =12 Ω; L = 6 mH VCC-

VCC-

57 V

VN751S Waveforms and truth table

Doc ID 12320 Rev 7 7/17

4 Waveforms and truth table

Figure 4. Switching time waveforms

Table 8. Truth table

Conditions Input Output Status

Normal operation L

Current limitation

(TJ < TTSD) H

(TJ > TTSD) L

Overtemperature L

Undervoltage L

Overvoltage L

VOUT

VIN

80%

10%

dVOUT/dt(on)

td(off)

90%

dVOUT/dt(off)

td(on)

Waveforms and truth table VN751S

8/17 Doc ID 12320 Rev 7

Figure 5. Waveforms

INPUT

NORMAL OPERATION

UNDERVOLTAGE

VCC

VUSD

VUSDhyst

INPUT

OVERVOLTAGE

VCC

VCC>VOV

INPUT

LOAD VOLTAGE

VCC<VOV

LOAD VOLTAGE

OVERTEMPERATURE

INPUT

TTSD

LOAD CURRENT

STATUS

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VN751S Test circuit

Doc ID 12320 Rev 7 9/17

5 Test circuit

Figure 6. Peak short circuit current test circuit

Figure 7. Avalanche energy test circuit

Application schematic VN751S

10/17 Doc ID 12320 Rev 7

6 Application schematic

Figure 8. Application schematic

VN751S Reverse polarity protection

Doc ID 12320 Rev 7 11/17

7 Reverse polarity protection

A schematic solution to protect the IC against a reverse polarity condition is proposed.

This schematic is effective with any type of load connected to the outputs of the IC.

The RGND resistor value can be selected according to the following conditions to be met:

RGND ≤ 600 mV / (IS in ON state max).

RGND ≥ (-VCC) / (-IGND)

where -IGND is the DC reverse ground pin current and can be found in the absolute

maximum rating section of the device datasheet.

The power dissipation associated to RGND during reverse polarity condition is:

PD = (-VCC)2/RGND

This resistor can be shared by several different ICs. In such case IS value on formula (1) is

the sum of the maximum ON-state currents of the different devices.

Please note that if the microprocessor ground and the device ground are separated then the

voltage drop across the RGND (given by IS in ON state max * RGND) produce a difference

between the generated input level and the IC input signal level. This voltage drop will vary

depending on how many devices are ON in the case of several high side switches sharing

the same RGND.

Figure 9. Reverse polarity protection

Statusi

Inputi

GND

Outputi

+ Vcc

RGND

(Optional)

Load

Statusi

Inputi

GND

Outputi

+ Vcc

RGND

(Optional)

Load

Package mechanical data VN751S

12/17 Doc ID 12320 Rev 7

8 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of

ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®

specifications, grade definitions and product status are available at: www.st.com.

ECOPACK is an ST trademark.

VN751S Package mechanical data

Doc ID 12320 Rev 7 13/17

Figure 10. Package dimensions

Table 9. SO-8 mechanical data

Dim.

mm inch

Min Typ Max Min Typ Max

A 1.75 0.068

a1 0.1 0.25 0.003 0.009

a2 1.65 0.064

a3 0.65 0.85 0.025 0.033

b 0.35 0.48 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.25 0.5 0.010 0.019

c1 45 (typ.)

D 4.8 5.0 0.188 0.196

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 3.81 0.150

F 3.8 4.0 0.14 0.157

L 0.4 1.27 0.015 0.050

M 0.6 0.023

S 8º (max.)

Package mechanical data VN751S

14/17 Doc ID 12320 Rev 7

Figure 11. SO-8 tape and reel information

VN751S Order code

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9 Order code

Table 10. Order codes

Order codes Package Packaging

VN751S SO-8 Tube

VN751STR SO-8 tape and reel

Revision history VN751S

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10 Revision history

Table 11. Document revision history

Date Revision Changes

18-Sep-2006 1 Initial release

12-Mar-2007 2 Document reformatted, typo in Section Table 3.: Power on

page 5, updated Ptot value Ta b le 2 .

15-May-2007 3 Typo in Table 1 on page 3 VESD

18-Sep-2007 4 Added ISTAT value in Table 1 on page 3

11-Oct-2007 5 Updated Table 2 on page 3

08-Jul-2008 6 Added Section 7 on page 10

30-Nov-2009 7 Updated coverpage and Chapter 6 on page 10

VN751S

Doc ID 12320 Rev 7 17/17

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