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MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
MC33185
SINGLE LOW SIDE DRIVER
SILICON MONOLITHIC INTEGRATED CIRCUIT
Product Preview Single Low Side Driver with Integrated Freewheeling Diode and Output dv/dt & di/dt Control
The Short-circuit Protected Low Side Driver will be used for PWM switchmode current control of an inductive load. If one or both of the two inputs (Reset or PWM) switche at the low level input voltage, the output transistor will be turned off. Only if both inputs are at the high level input voltage, the output will be turned on. Reset and PWM inputs have Schmitt-Trigger input characteristics. To protect the device and a possible external shunt for current measurements against short-circuit to positive battery voltage, the onstate output current is limited to a maximum value of 7 A. The output driver will be switched off if the junction temperature exceeds its maximum value. This thermal shutdown is monitored by an hysteresis. In order to reduce RFI, the output voltage and supply current rise and fall times are limited. At a Vs voltage lower than approximately 6V, the driver will be switched off by the undervoltage shutdown circuit. Down to this voltage the driver will work correctly.
D2PAK
PIN ASSIGNMENT
VS 1 Reset 2 Output 3 PWM 4
8 7 6 5
GND
ORDERING INFORMATION Temperature Package Range D2PAK MC33185D2T - 40C to +125C Device
Block Diagram and Typical Application
VS
VOLTAGE REFERENCE TEMP. LIMIT Clr RESET GATE DRIVER with dI/dt & dV/dt Limitation OUTPUT
PWM
UNDER VOLTAGE DETECTOR
CURRENT MONITORING & LIMIT
GND
This document contains information on a new product under development. Motorola reserves the O Motorola,Inc right to change or discontinue this product without notice.
Date : 10/12/98 Rev : 1.0
MC33185
MAXIMUM RATINGS Tc = - 40 to 125C unless otherwise noted.
Ratings ELECTRICAL RATINGS Supply Voltage DC Voltage Transient Voltage (400ms, no repetitive, no operation) Output Voltage DC Voltage Transient (Schaffner Pulses). Note 1b Output Current (internally protected) Freewheeling Diode Reverse Voltage (Q = GND) DC Voltage Transient (Schaffner Pulses). Note 1a, 1b Freewheeling Diode Forward Current DC Current Transient (200ms) Peak (10ms) MOS Body Diode Forward Current DC Current Peak (10ms) Input Voltages (Reset & PWM pins) ESD Voltage Capability. Note 2 THERMAL RATINGS Storage Temperature Operating Junction Temperature Power Dissipation @Tc = 110C Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient Maximum Lead Temperature for Soldering 1/8O from case for 5s. Tstg Tj Pd RthJC RthJA TL - 55 to 175 - 40 to 150 13 3 65 275 C C W C/W C/W C Ibd Ibdpk Vreset & Vpwm Vesd 1,7 10 - 0,3 to 6 2000 Vffw Vffwtr Vffwpk VS-Q 40 V Note1 Q-Gnd - 0,5 to Vs +1,5 Vs-Gnd V Symbol Value Unit
40
- 2 to 40
V V
V V V
V
1,7 3,3 10
A A A
A A A V V
MC33185
MOTOROLA
2
MC33185
ELECTRICAL CHARACTERISTICS. 7V <= Vs <= 24V, -40C <= Tj <= 150C unless otherwise specied. Parameters VS PIN 1 Supply Voltage Operating Maximum. Note 3 Turn On Threshold (fully functional) Quiescent Vs Supply Current (Vs = Q = 12V, IN1 & IN2 = L) Undervoltage Detection. Note 7 RESET PIN 2 Vs 24 7 Isby 1 5,5 5 6,9 V V mA V Symbol Min Typ Max Unit
Input Current High level (7,0V <= Vs <= 40,0V) High level (- 2V <= Vs <= 40,0V) Low level (- 2V <= Vs <= 40,0V)
OUTPUT PIN 3
lih lih lil
5,0 - 10 - 10
10 10 10
mA mA mA
Drain to Source On Resistance. Note 4 (with IN1 & IN2 = H, Active High) Iout = 1,5A & Vs >= 10,0V Iout = 1,5A & 7,0V <= Vbat < 10,0V Tj = 25C, Iout = 1,5A & Vbat = 12V Off State MOS Output Leakage Current Vs = Q = 40V, IN1 & IN2 = L Forward Voltage of MOS Body Diode VF @ If = 1,7A. Note 5 Switchmode Output Current Continuous Transient (200ms, Tc = 125C) Short-Circuit Current Limit. Note 6 Overtemperature Shutdown Overtemperature Hysteresis. Note 8
PWM PIN 4
Rdson 0,450 0,500 0,250 Voutlk Vfbd 2 Isw Iswpk Isc Tlim Thys 3,5 155 20 5,25 1,7 3,3 7 V A A A C C 1 Ohm Ohm Ohm mA
Input (CMOS Compatible) Output On Threshold Output Off Threshold Input Hysteresis Voltage Input Current High level (7,0V <= Vs <= 40,0V) High level (- 2V <= Vs <= 40,0V) Low level (- 2V <= Vs <= 40,0V)
Vion Vioff Vihys lih lih lil
2.0 1.0 1 5,0 - 10 - 10
3.0 2.0
V V V mA mA mA
10 10 10
FREEWHEELING DIODE CHARACTERISTICS 7V <= Vs <= 24V, -40C <= Tj <= 150C unless otherwise noted
Forward Voltage Tj = 25C, If = 1,7A Tj = 125C, If = 1,7A Reverse Leakage Current (Vs = Vq = 40V) Leakage Current from Vs-GND Vs = 40V during Freewheeling. Note 9, If = 1,7A Ifwlk
1,5 1,3 500 22
V V mA mA
MC33185
MOTOROLA
3
MC33185
ELECTRICAL CHARACTERISTICS. 7V <= Vs <= 24V, -40C <= Tj <= 150C unless otherwise specied. Parameters Symbol Min Typ Max Unit
TIMING CHARACTERISTICS 7V <= Vs <= 24V, -40C <= Tj <= 150C unless otherwise specied.
Turn On Delay Turn Off Delay Rise Time. Note 10 Output Voltage Slope Output Current Slope Fall Time. Note 10 Output Voltage Slope Output Current Slope
tdl on tdl off (dVout/dt)r (dlout/dt)r (dVout/dt)f (dlout/dt)f 2,5 50 2,5 50
10 10 10 100 10 100
ms ms V/ms mA/ms V/ms V/ms
NOTES 1a : Schaffner test, see gure 3, Pulses 1, 2, 3a, 3b, 5, 6. NOTES 1b : Schaffner test, see gure 4, Pulses 1, 2, 3a, 3b, 5, 6. NOTES 2 : Equivalent human body model R = 1,5KW ; C = 200pF. NOTES 3 : The normal operating voltage range is 7V <= Vs <= 24V. Between 24V and 40V the output stage will follow the state dened by the inputs, but the electrical characteristics are not totally specied. NOTES 4 : Pulse tested, tp<=300ms, D<=2%. NOTES 5 : The inherent body diode (source to drain) of the output FET will conduct current if the output pin is pulled below ground. NOTES 6 : Linear short-circuit current regulation. When the overcurrent lasts enough time to raise the junction temperature, thermal shutdown will react as described in note 8. NOTES 7 : The driver works correctly down to the shutdown voltage. Below the shutdown voltage, the driver is off. NOTES 8 : The output driver will be switched off if the junction temperature exceeds its maximum value. This thermal shutdown works with an hysteresis, with a self reset. NOTES 9 : This is the current measured on GND when the device is in freewheeling. It consists in the supply current for the logic (5mA max) plus the leakage current owing from Vs to GND. The leakage current is specied to be less than 1% of the nominal freewheeling forward current. NOTES10 : In order to reduce RFI, the output voltage and supply current rise and fall times are limited.
MC33185
MOTOROLA
4
MC33185
Pin
Name
Description
1 2 3
Vs Reset Output
The Vs pin supplies operational power to the MC33185. This pin controls the turn OFF of output. This pin is internally connected to the DMOS output transistor which source current into the corresponding load. The output incorporates dynamic clamping to accommodate inductive load. In order to reduce RFI, the output voltage and supply current rise and fall times are limited (see gure below). In addition, the output has an overcurrent detection and current limiting. This pin controls the turn ON and turn OFF of output when reset pin is at high level. It is a CMOS input. This pin is the circuit ground.
4 5
PWM GND
Figure 1. Timing Diagram
5V I2 Input Signal (Vin) 12V +5V Vs I1 Q I2 Gnd Vin Is Vq Current through Low Side Switch (If) di/dt 5% di/dt 0 Is If 1A Output Voltage(Vq) td du/dt td 12V du/dt 5% 0 1A 0
Current through Freewheeling diode(If)
di/dt
di/dt
1A 0
Figure 1: The minimum value is due to the fact that the product should not dissipate too much during transition.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Typical parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
MC33185
MOTOROLA
5

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