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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 TD340integrated 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).TD340achieves 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,TD340integrates 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,und
ervoltage or CPU loss of control (watchdog).TD340withstands transients as met in automotive field without special protection devices thanks to its 60V BCD technology.
ORDER CODE
D =Small Outline Package (SO)-also available in Tape &Reel (DT)
PIN CONNECTIONS (top view)
Part Number Temperature Range Package
D TD340ID
-40°C,+125°C
•
D SO20
(Plastic Micropackage)
VBATT VOUT RESET CWD WD STBY TEMP IN1IN2CF
GND
L1L2S2H2CB2S1H1CB1OSC 10
98765432111
121314151617181920TD340
H-BRIDGE QUAD POWER MOSFET DRIVER
FOR DC MOTOR CONTROL
This is preliminary information on a new product now in development or undergoing evaluation.Details are subject to change without notice.
May 2000
PRELIMINARY DATA
TD340
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SYSTEM AND INTERNAL BLOCK DIAGRAM
PIN DESCRIPTION
VBATT
VOUT RESET
CWD
WD STBY TEMP IN1IN2CF
GND
L1
L2S2H2CB2
S1H1
CB1OSC Q2H
Q2L
Q1H
Q1L
BATT -
BATT +
T °
LOGIC
PWM PWM
WATCHDOG
RESET
SUPPLY UVLO OVLO
TD340
µC O N T R O L L E R
5V
0V
M
Name Pin Type
Function
VBATT 1Power Input Power Supply GND 11Ground
Ground
L112Push Pull Output Low Side Drive -Gate 1L213Push Pull Output Low Side Drive -Gate 2H118Push Pull Output High Side Drive -Gate 1H215Push Pull Output High Side Drive -Gate 2S117Analog Input High Side Drive -Source 1S217Analog Input High Side Drive -Source 2
CB119Analog Input High Side Drive -Bootstrap Capacitor 1CB216Analog Input High Side Drive -Bootstrap Capacitor 2
CF 10Analog Input
External Capacitor to set the PWM Switching Frequency
IN18Analog or Digital Input
Analog Level of PWM (0to 100%)if CF connected to a capacitor,
or PWM Signal if CF connected to ground IN29Digital Input Direction to the Motor’s Rotation STBY 6Digital Input Standby Mode
TEMP 7Analog Output Analog Indicator of Temperature
VOUT 2Power Output
Regulated Power Supply Output for the Microcontroller -5V RESET 3Open Drain Output Reset Signal for the Microcontroller
WD 5Digital Input Watchdog Signal from the Μicrocontroller CWD 4Analog Input External Capacitor to set Watchdog Timeout OSC
20
Digital Output
Oscillator Output
TD340
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ABSOLUTE MAXIMUM RATINGS
Notes:
1.The duration of the 60V voltage must be limited to 1second if current is drained from the Vout regulator.Supply voltage in steady state must be limited to ensure that dissipation rating is not exceeded.
2.The magnitude of input and output voltages must never exceed Vbatt+0.3V or 60V,whichever is less,except for H1and H2:Vbatt+15V or 60V,whichever is less.
OPERATING CONDITIONS
Symbol Parameter
Value Unit V Batt Positive Supply Voltage -Note 1
60V P d Power Dissipation 500mW
T stg Storage Temperature
-55to +150
o
C ES
D Electrostatic Discharge
2kV V digital Voltage on pins:IN1,IN2,STBY,WD,CWD,CF,TEMP,VOUT,RESET
-0.3to 7V V lowgate Voltage on pins:L1,L2
-0.3to 15V V power Voltage on pins:H1,H2,S1,S2,CB1,CB2-Note 2-0.3to 60V V osc Voltage on pin OSC
Vbatt-6.5to Vbatt
V
T j Maximum Junction Temperature 150°C R hja
Thermal Resistance Junction-Ambient
85
°C/W
Symbol Parameter
Value Unit V batt Positive Supply Voltage
6.5to 18.5V T oper
Operating Free Air Temperature Range
-40to +125
°C
TD340
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ELECTRICAL CHARACTERISTICS
Vbatt=12V,Tamb=-40°C to 125°C (unless otherwise specified)
Symbol Parameter
Test Condition
Min.
Typ.Max.Unit I CC Total Supply Current T min.<T amb <T max.
T=25°C
-40°C <T <125°C 4.55710mA mA I stdby
Supply Current in Standby Mode
T=25°C
-40°C <T <125°C
180
300350
µA µA Standby H STDBY Pin Voltage for Standby OFF 0.8
V Standby L STDBY Pin Voltage for Standby ON 2
V UVLO Under Voltage Lockout -when
Vbatt<UVLO all buffer outputs are low Vbatt decreasing Hyst.=100mV typ. 5.8 6.2 6.5V OVLO
Under Voltage Lockout -when
Vbatt>OVLO all buffer outputs are low
Vbatt decreasing Hyst.
=300mV
18.5
20
21.5
V
DRIVERS -Cbootstrap=47nF
V gs Static Gate-Source High Side Mosfet Volt-age (charge pump)
No Bootstrap Cap
8
1115
V V gsd Dynamic Gate-Source High Side Mosfet Voltage (bootstrap)
9
V Freq Switching Frequency of PWM Cf =270pF
202530kHz t d
Dead Time for secure Synchronous Rectification
Cf=270nF,IN1=2.4V No Load Cload=4nF 2.1
2.81.5
3.5µs µs I outl
Output Current Capability -Low Side Source
Sink
T=25°C
40°C <T <125°C T=25°C
40°C <T <125°C 302560505050100100100100150150mA mA mA mA I outh
Output Current Capability -High Side Source
Sink
T=25°C
40°C <T <125°C T=25°C
40°C <T <125°C 302560505050100100100100150150mA mA mA mA OSCILLATOR -Rosc=5.6k -Note 1
F osc Frequency of internal Step up converter Oscillator
T=25°C
40°C <T <125°C 0.60.511
1.41.5MHz MHz V osc
Oscillator Swing -note 7
Vbatt =12V Vbatt =9V Vbatt >UVLO
6.256.255.1
121212.5
V V V
TD340
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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
V out Output Voltage
Io=20mA T=25°C
40°C <T <125°C
4.64.5
55
5.45.5V V Line Reg Line Regulation
6V <Vbatt <16V,Io=20mA T=25°C
40°C <T <125°C 100150mV mV Load Reg Load Regulation
0≤Io ≤40mA T=25°C
40°C <T <125°C 2040
mV mV I o Maximum Output Current Vbatt =12V
6V <Vbatt <16V 4020
mA mA I os Output Current Short Circuit
Vout=0
100200mA RESET SUPERVISORY CIRCUIT -note 3
Vt hi Threshold Voltage Vout Increasing T=25°C
40°C <T <125°C 4.03.9 4.3 4.54.6V V V thd Threshold Voltage Vout Decreasing T=25°C
40°C <T <125°C
3.93.8
4.2 4.44.5
V V
k i Linearity coefficient (Vthi =ki Vout)0.86k d Linearity coefficient (Vthd =kd Vout)0.84
V hys Hysteresis Threshold Voltage 50
100200
mV t phl Response Time High to Low
5
µs WATCHDOG CIRCUIT
t wd Watchdog Time Out Period
No ext.capacitor Cwd =47nF -note 4
0.50.711
21.5ms s t ipw Watchdog Input Pulse Width for Proper Retrigger
0.1
µs t ipr Watchdog Input Rise Time for Proper Retrigger
0.1
µs t reset Reset Pulse Width 10
2040µs TEMPERATURE OUTPUT
V T Output Voltage
T=25o C
2.58 2.68 2.78V
∆V T
Output Temperature Drift
-7
-7.5
-7.8
mV/o C
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.
