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PDF TD340 Data sheet ( Hoja de datos )

Número de pieza TD340
Descripción H-BRIDGE QUAD POWER MOSFET DRIVER FOR DC MOTOR CONTROL
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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No Preview Available ! TD340 Hoja de datos, Descripción, Manual

TD340
H-BRIDGE QUAD POWER MOSFET DRIVER
FOR DC MOTOR CONTROL
s QUAD N-CHANNEL MOSFET DRIVE
s INTEGRATED CHARGE PUMP FOR HIGH
SIDE MOSFET DRIVING
s VERY LOW GROUND EMI NOISE
s MOTOR SPEED AND DIRECTION CON-
TROL (LOW SIDE PWM)
s INTERNAL OR EXTERNAL PWM SOURCE
s 25kHz SWITCHING FREQUENCY ABILITY
s SYNCHRONOUS HIGH SIDE RECTIFICA-
TION
s REVERSED BATTERY ACTIVE PROTEC-
TION ABILITY
s INTEGRATED 5V POWER SUPPLY FOR
MICROCONTROLLER
s INTEGRATED SECURITY CIRCUITS:
UVLO, OVLO, WATCHDOG
s 60V MAX RATING
DESCRIPTION
The TD340 integrated circuit allows N-Channel
Power Mosfets driving in a full H-bridge
configuration and is best suited for DC Motor
Control Applications. The four drivers outputs are
designed to allow 25kHz MOSFET switching.
The speed and direction of the motor are to be set
by two pins. Voltage across the motor is controlled
by low side Pulse Width Modulation (PWM). This
PWM feature can be made internally when the
input pin is connected to an analog signal, or it can
be given directly from a digital source.
An internal charge pump allows proper upper
MOS driving for full static operation (100% PWM).
TD340 achieves very low EMI noise thanks to its
balanced charge pump structure and its drivers
moderate slew rate.
To avoid excessive heating due to free wheeling,
appropriate synchronous rectification is achieved
on the corresponding High Side MOSFET.
Moreover, TD340 integrates a 5V voltage
regulator suitable as a power supply output for the
microcontroller, a Reset circuit and a Watchdog
circuit.
Security functions disable the TD340 (MOS off)
when abnormal conditions occur like overvoltage,
undervoltage or CPU loss of control (watchdog).
TD340 withstands transients as met in automotive
field without special protection devices thanks to
its 60V BCD technology.
PRELIMINARY DATA
D
SO20
(Plastic Micropackage)
ORDER CODE
Part Number Temperature Range
TD340ID
-40°C, +125°C
Package
D
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
VBATT 1
VOUT 2
RESET 3
CWD 4
WD 5
STBY 6
TEMP 7
IN1 8
IN2 9
CF 10
20 OSC
19 CB1
18 H1
17 S1
16 CB2
15 H2
14 S2
13 L2
12 L1
11 GND
May 2000
1/21
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

1 page




TD340 pdf
TD340
ELECTRICAL CHARACTERISTICS (continued)
Vbatt= 12V, Tamb=-40°C to 125°C (unless otherwise specified)
Symbol
Parameter
Test Conditio n
Min. Typ. Max. Unit
VOLTAGE REGULATOR - Co=220nF - note 2
Vout Output Voltage
Line
Reg
Line Regulation
Load
Reg
Load Regulation
Io Maximum Output Current
Ios Output Current Short Circuit
RESET SUPERVISORY CIRCUIT - note 3
Vthi Threshold Voltage Vout Increasing
Vthd Threshold Voltage Vout Decreasing
ki Linearity coefficient (Vthi = ki Vout)
kd Linearity coefficient (Vthd = kd Vout)
Vhys Hysteresis Threshold Voltage
tphl Response Time High to Low
WATCHDOG CIRCUIT
Io=20mA
T=25°C
40°C < T < 125°C
6V < Vbatt < 16V, Io=20mA
T=25°C
40°C < T < 125°C
0 Io 40mA
T=25°C
40°C < T < 125°C
Vbatt = 12V
6V < Vbatt < 16V
Vout=0
4.6
4.5
40
20
5 5.4 V
5 5.5 V
100 mV
150 mV
20 mV
40 mV
mA
mA
100 200 mA
T=25°C
40°C < T < 125°C
T=25°C
40°C < T < 125°C
4.0 4.3 4.5 V
3.9 4.6 V
3.9 4.2 4.4 V
3.8 4.5 V
0.86
0.84
50 100 200 mV
5 µs
twd Watchdog Time Out Period
tipw
Watchdog Input Pulse Width for Proper
Retrigger
tipr
Watchdog Input Rise Time for Proper
Retrigger
treset Reset Pulse Width
TEMPERATURE OUTPUT
No ext. capacitor
Cwd = 47nF - note 4
0.5 1
2 ms
0.7 1 1.5 s
0.1 µs
0.1 µs
10 20 40 µs
VT Output Voltage
T= 25oC
2.58 2.68 2.78 V
VT Output Temperature Drift
-7 -7.5 -7.8 mV/oC
Notes :
1. For proper operation, a 5.6k resistor needs to be connected between OSC and GND.
2. 220nF is the optimized value for the voltage regulator
3. The reset thresholds (Vout increasing and decreasing) are proportional to Vout, (coefficients ki and kd). ki and kd vary in the same direc-
tion with temperature.
4. Watchdog capacitor Cwd should be placed as close as possible to CWD pin.
5/21

5 Page





TD340 arduino
TD340
Reversed battery active protection
In full H-bridge configuration, there is a risk in case of power voltage reversal due to the intrinsic diodes
inside the MOS. A passive protection solution is to wire a diode between the H-bridge and the power
supply. Disadvantages are voltage drop and power dissipation.
The TD340 provides support for reversed battery active protection.
An oscillator OSC output is available to allow proper command of a 5th MOS connected upside down.
The MOS must have low threshold voltage because the oscillator output swing is about 6.5V.
In normal conditions, the MOS intrinsic diode supplies power to the driver at startup. When the TD340 is
started, the OSC output enables the MOS to switch on, providing lower voltage drop and lower power
dissipation.
In case of reversed battery, the 5th MOS remains off, and no dangerous voltages can reach the driver nor
the power MOS.
The OSC oscillator can only supply a few mA. It must be loaded with a large impedance, typically 100pF
and 680k.
Figure 5 : Reversed Battery Active Protection Principle
Normal Conditions
VBATT
Osc Vbatt
Vbatt+6V
~Vbatt
1
2
3
TD340 4
M
2
3
GND
REVERSED BATTERY
5
Driver is not supplied
GND
MOSFET 5
REMAINS
OFF
Osc Vbatt
12
2M
3
TD340 4
3
VBATT
ALL MOSFETS AND DRIVER ARE PROTECTED
UVLO and OVLO protections
The TD340 includes protections again overvoltage and undervoltage conditions.
Overvoltage is dangerous for the MOS and for the load due to possible excessive currents and power
dissipation.
Undervoltage is dangerous because MOS driving is no more reliable. MOS could be in linear mode with
high ohmic dissipation.
TD340 Under Voltage LockOut and Over Voltage LockOut features protect the system from no
operational power voltage. UVLO and OVLO thresholds are 6.2V and 20V. Hysteresis provides reliable
behavior near the thresholds.
During UVLO and OVLO, MOS are switched off (TD340 in disable state).
11/21

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