LV8762T-TLM-H - ON Semiconductor

20911 SY 20110131-S00005 No.A1926-1/13

Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

s products or equipment. To verify symptoms and states that cannot be evaluated in an independent

device, the customer should always evaluate and test devices mounted in the customer

sproductsor

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.

LV8762T

Overview

The LV8762T is an 1ch H-bridge driver that can control four operation modes (forward, reverse, brake, and standby) of a

motor. The IC is optimal for use in driving brushed DC motors for office equipment.

Features

• Forward/reverse H-bridge motor driver: 1 channel • IOmax = 1A

• Built-in current limiter • Current limit mask function

• Built-in thermal protection circuit • Alert signal output

• Single power supply

• Built-in short-circuit protection function (selectable from latch-type or auto reset-type).

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage VM max 36 V

Output peak current IO peak tw ≤ 10ms, duty 20% 1.5 A

Output continuous current IO max 1.0 A

Logic input voltage VIN max -0.3 to +6 V

EMO pin input voltage VEMO -0.3 to +6 V

Allowable power dissipation Pd max Mounted on a specified board. * 1.4 W

Operating temperature Topr -20 to +85 °C

Storage temperature Tstg -55 to +150 °C

* Specified circuit board : 57mm×57mm×1.6mm, glass epoxy both-type board.

Bi-CMOS LSI

Forward/Reverse H-bridge Driver

Orderin

numbe

: ENA1926

LV8762T

No.A1926-2/13

Allowable Operating Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage range VM 9 to 32 V

VREF input voltage VREF 0 to 3 V

Logic input voltage VIN 0 to 5.5 V

Electrical Characteristics at Ta = 25°C, VM = 24V, VREF = 1.5V

Ratings

Parameter Symbol Conditions min typ max

Unit

General

Standby mode current drain IMst ST = “L” 100 400 μA

Operating mode current drain IM ST = “H”, IN1 = “H”, IN2 = “L”, with no load 3 5 mA

REG5 output voltage VREG IO = -1mA 4.5 5 5.5 V

Thermal shutdown temperature TSD Design guarantee * 150 180 200 °C

Thermal hysteresis width ΔTSD Design guarantee * 40 °C

Output block

RonU IO = 1A, upper side ON resistance 0.75 0.97 Ω Output on resistance

RonD IO = -1A, under side ON resistance 0.5 0.65 Ω

Output leakage current IOleak VO = 32V 50 μA

Diode forward voltage VD ID = -1A 1.2 1.4 V

Rising time tr 10% to 90% 100 200 ns

Falling time tf 90% to 10% 100 200 ns

tpLH IN1 to OUTA, IN2 to OUT B (L → H) 550 750 ns Input output delay time

tpHL IN1 to OUTA, IN2 to OUT B (H → L) 550 750 ns

Control system input block

Logic pin input H-level voltage VINH 2.0 V

Logic pin input L-level voltage VINL 0.8 V

IINL VIN = 0.8V 4 8 12 μA Logic pin input current 1

IINH VIN = 5V 30 50 70 μA

VREF input current IREF VREF = 1.5V -0.5 μA

Current limit comparator

threshold voltage Vtlim VREF = 1.5V 0.291 0.3 0.309 V

CHOP pin charge current ICHOP -6.5 -5 -3.5 μA

CHOP pin threshold voltage VtCHOP 0.8 1 1.2 V

CMK pin charge current ICMK -32.5 -25 -17.5 μA

CMK pin threshold voltage VtCMK 1.2 1.5 1.8 V

Charge pump block

Step-up voltage VGH VM = 24V 27.7 28.7 29.7 V

Rising time tONG VG = 0.1μF 250 550 μs

Oscillation frequency Fcp 90 125 155 kHz

Short-circuit protection block

EMO output saturation voltage VEMO I

EMO = 1mA 0.4 V

SCP pin charge current ISCP SCP = 0V -6.5 -5 -3.5 μA

Comparator threshold voltage VtSCP 0.8 1 1.2 V

* Design guarantee value and no measurement is made.

LV8762T

No.A1926-3/13

Package Dimensions

unit : mm (typ)

3260A

Pin Assignment

SANYO : TSSOP24(225mil)

6.4

0.5

4.4

(0.5)

(1.0)

6.5

0.5

0.15

112

24 13

0.22

0.08 1.2max

2PGND

OUTB

RNF

EMM

SCP

VREF

IN2

IN1

REG5

CP1

OUTA

CP2

OUTA

GND

CMK

21 CHOP

EMO

Top view

LV8762T

No.A1926-4/13

Substrate Specifications (Substrate recommended for operation of LV8762T)

Size : 57mm × 57mm × 1.6mm (two-layer substrate)

Material : Glass epoxy both-type board

L1 : Copper wiring pattern diagram L2 : Copper wiring pattern diagram

Cautions

1) For the set design, employ the derating design with sufficient margin.

Stresses to be derated include the voltage, current, junction temperature, power loss, and mechanical stresses such as

vibration, impact, and tension.

Accordingly, the design must ensure these stresses to be as low or small as possible.

The guideline for ordinary derating is shown below :

(1)Maximum value 80% or less for the voltage rating

(2)Maximum value 80% or less for the current rating

(3)Maximum value 80% or less for the temperature rating

2) After the set design, be sure to verify the design with the actual product.

Confirm the solder joint state and verify also the reliability of solder joint for the Exposed Die-Pad, etc.

Any void or deterioration, if observed in the solder joint of these parts, causes deteriorated thermal conduction,

possibly resulting in thermal destruction of IC.

Pd max - Ta

1.0

1.5

0.5

2.0

1.40

0.73

—

20 40 60 80200 100

Ambient temperature, Ta - C

Allowable power dissipation, Pd max - W

LV8762T

No.A1926-5/13

Block Diagram

TSD

LVS

GND

VGCP2

REG5

SCP EMM

CP1 OUTBOUTA RNF

PGND

VREF

IN1 IN2

CHOP CMK

EMO

Charge pump

Short-circuit

Protection Circuit

Oscillation

circuit Output control

logic

Output preamplifier stage

Reference

Voltage

Circuit

Current

Limiter

Circuit

Current Limiter

Mask

Brake-Time

Setting Circuit

LV8762T

No.A1926-6/13

Pin Functions

Pin No. Pin Name Pin Functtion Equivalent Circuit

IN1

IN2

EMM

Output control signal input pin 1.

Output control signal input pin 2.

Short protection mode setting.

VREG5

GND

12 ST Standby mode setting

VREG5

GND

9, 10

3, 4

7, 8

5, 6

OUTA

OUTB

RNF

PGND

OUTA output pin.

OUTB output pin.

Motor power-supply connection pin.

Current sense resistor connection pin.

Power ground.

GND

CP1

CP2

Charge pump capacitor connection pin.

Motor power-supply connection pin.

Charge pump capacitor connection pin.

GND

VREG5 16 158 14

Continued on next page.

LV8762T

No.A1926-7/13

Continued from preceding page.

Pin No. Pin Name Pin Functtion Equivalent Circuit

20 VREF Reference voltage input pin for output

current limit setting.

GND

VREG5

17 REG5 Internal reference voltage output pin.

GND

24 EMO Alert signal output

VREG5

GND

CHOP

SCP

Capacitor connection for current limit

break time setting

Capacitor connection for shor t detection

time setting

GND

VREG5

23 CMK Capacitor connection for current limit

mask setting

GND

VREG5

LV8762T

No.A1926-8/13

DC Motor Driver

1.Standby function

This is can switch the standby – operation mode by setting the ST pin.

On standby-mode, all logic circuit is reset, internal regurator is off, internal charge-pump is off.

ST mode 5V regurator charge pump

“L” or OPEN standby mode standby standby

“H” operation mode on on

2.DCM output control logic

Contol Input Output

ST IN1 IN2 OUTA OUTB Mode

L * * OFF OFF Standby

H L L OFF OFF Output OFF

H H L H L CW (forward)

H L H L H CCW (reverse)

H H H L L Brake

3.Current limit control timing chart

4. Setting the time of current limit brake value

This IC can set the time of the current limit break by connecting the capacitor with CHOP-GND.

The value of the capacitor is decided according to the following expression.

brake time: TCHOP ≈ CCHOP × VtCHOP ÷ ICHOP [sec]

VtCHOP:CHOP comparator threshold voltage. TYP=1.0[V]

ICHOP:CHOP charge current. TYP=5[μA]

ex. Cchop=50[pF]

Tchop[sec] = 50[pF] × 1.0[V] ÷ 5[μA] = 10[μs]

Tchop

SLOW

CHARGE

OUTA

OUTB

Output

current

LIMIT current

LV8762T

No.A1926-9/13

5.Setting the current limit value

The current limit value of the DCM driver is determined by the VREF voltage and the resistance (RNF) connected

across the RNF and GND pins using the following formula :

Ilimit [A] ≈ (VREF [V] ÷5) ÷RNF [Ω])

Assuming VREF = 1.5V, RNF = 1Ω, the current limit is :

Ilimit = 1.5V÷5÷1Ω = 0.3A

6. Setting the mask of current limit

CMK mask of current limit

“L” no operation

“H” or OPEN operation

This function can be switched by CMK pin.

This function can prevent the current limit from working by the motor start-up current when the current limit value is

set low.

7. Setting the time of the mask of current limit

This IC can set the time of the mask of current limit by connection the capacitor with CMK-GND.

The value of the capacitor is decided according to the following expression.

Time of mask:TCMK ≈ CCMK × VtCMK ÷ ICMK [sec]

VtCMK:CMK comparator threshold voltage. TYP=1.0[V]

ICMK:CMK charge current. TYP=25[μA]

ex. CCMK=0.1[μF]

TCMK[sec] = 0.1[μF] x 1.5[V] ÷ 25[μA] = 6[ms]

LV8762T

No.A1926-10/13

Output short-circuit protection fun ction

Thils IC incorporates an output short-circuit protection circuit.It turns the output off to prevent destruction of the IC if

a problem such as an output pin being shorted to the motor power supply or ground occurs.

Then short-circuit detected, alart signal is assert to EMO pin.

1. Output short protect mode

This function can be switched by EMM pin. EMM pin is L or OPEN then latch method, H then auto-retry method.

EMM Pin Method

“L” or OPEN Latch

“H” Auto retry

2.Protection function operation (Latch method)

The short-circuit protection circuit is activated when it detects the output short-circuit state. If the short-circuit state

continues for the internally preset period (≈ 2μs), the protection circuit turns off the output from which the short-circuit

state has been detected. Then it turns the output on again after a lapse of the timer latch time (TSCP) described later. If

the short-circuit state is still detected, it changes all the outputs to the standby mode and retains the state. The latched

state is released by setting the ST to L.

3. Protection function operation (Auto retry method)

In this mode, short-protection function try repeatedly to detecting short-circuit.

The short-circuit detection circuit operates when a short output is detected as well as the latch method. The output is

switched to the standby mode when the operation of the short-circuit detection circuit exceeds time (TSCP) of the timer

latch, and it returns to the turning on mode again after 2ms(typ). At this time, the switching mode is repeated when is

still in the overcurrent mode until the overcurrent mode is made clear.

4.Unusual Condition Warning Output Pin (EMO)

The LV8762T is provided with the EMO pin which notifies the CPU of an unusual condition if the protection circuit

operates by detecting an abnormal condition of the IC. This pin is of the open-drain output type, and if abnormality is

detected, the EMO output becomes (EMO=L) of on.

The EMO pin is placed in the ON state when one of the following conditions occurs.

1. Shorting-to-power or shorting-to-ground occurs at the output pin and the output short-circuit protection circuit is

activated.

2. The IC junction temperature rises and the thermal protection circuit is activated.

H bridge

Output state Output ON

Output ON

Outout OFF Stand-by

state

Threshold voltage

SCP voltage

Short-circuit

detection state

Internal counter

Short-

circuit Short-circuit

Release

1st counter

start 1st counter

stop 1st counter

start 1st counter

end 2st counter

start 2st counter

end

LV8762T

No.A1926-11/13

5.Timer latch-up (TSCP)

The user can set the time at which the outputs are turned off when a short-circuit occurs by connecting a capacitor

(CSCP) across the SCP and GND pins. The value of the capacitor (CSCP) can be determined by the following formula :

Timer latch-up : TSCP T

SCP ≈ CSCP × VtSCP ÷ ISCP [sec]

VtSCP : Comparator threshold voltage (1V typical)

SCP : SCP charge current (5μA typical)

Thermal protection circuit

This IC incorporates an thermal protection circuit, and the output is turned off when junction temperature Tj exceeds

180°C, and the abnormal state output (EMO pin) is turned on at the same time. The output is driven again when

temperature hysteresis falling (automatic restoration). The overheating protection circuit doesn't guarantee protection

and the destruction prevention of the set because it becomes operation by the area where ratings Tjmax=150°C of the

junction temperature were exceeded.

TSD = 180°C (typical)

ΔTSD = 40°C (typical)

Charge pump

This IC makes “H” ST pin, and operate the charge pump circuit, and VG pin voltage step-up VM voltage to VM+REG5

voltage. Use it after the time of tONG or more passes when drives the motor. If it is not so, on-resistance cannot be

secured.

VM+VREG5

VM+4V

tONG

VG pin voltage

LV8762T

No.A1926-12/13

Application Circuit Example

Current limit value

When VREF = 1.5V,

Ilimit = Vref ÷ 5 ÷ RNF

= 1.5V ÷ 5 ÷ 1Ω = 0.3A

Setting the current limit regeneration time and short-circuit detection time

TSCP ≈ CSCP × VtSCP ÷ ISCP

= 50pF × 1V ÷ 5μA = 10μs

Setting at current limit mask time

TCMK ≈ CCMK × VtCMK ÷ ICMK

= 0.1μF × 1.5V ÷ 25μA = 6ms

Setting at current limit brake time

TCHOP ≈ CCHOP × VtCHOP ÷ ICHOP

= 50pF × 1V ÷ 5μA = 10μs

* The external part constant is a reference value.

OUTB

RNF

24EMO

23CMK

22SCP

21CHOP

20VREF

IN2

IN1

REG5

CP1

OUTA

CP2

OUTA

GND

LV8762T

0.1 F

PGND

EMM

50pF

Control input

Overcurrent detection

monitor pin

Output current

setting input

LV8762T

PS No.A1926-13/13

SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using

products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition

ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.

products described or contained herein.

SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all

semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or

malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise

to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt

safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not

limited to protective circuits and error prevention circuits for safe design, redundant design, and structural

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intellctual property rights which has resulted from the use of the technical information and products mentioned

above.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed

for volume production.

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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the

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This catalog provides information as of February, 2011. Specifications and information herein are subject

to change without notice.