Features: `8.0 V to 28 V Continuous Operation (Transient Operation from 5.0 V to 36 V)
`225 m maximum RDS(ON) @ 150 (each H-Bridge MOSFET)
`3.0 V and 5.0 V TTL / CMOS Logic Compatible Inputs
`Overcurrent Limiting (Regulation) via Internal Constant-Off-Time PWM
`Output Short Circuit Protection (Short to VPWR or Ground)
`Temperature-Dependant Current-Limit Threshold Reduction
`All Inputs have an Internal Source/Sink to Define the Default (Floating Input) States
`Sleep Mode with Current Draw < 50A (with Inpus Floating or Set to Match Default Logic States)Specifications
|
Ratings |
Symbol |
Value |
Unit |
Power Supply Voltage
Normal Operation (Steady-State)
Transient Overvoltage(1) |
VPWR(SS)
VPWR(t)
|
- 0.3 to 28
- 0.3 to 40
|
V |
Logic Input Voltage (2)
SF Output(3)
Continuous Output Current(4) |
VIN
VSF
IOUT(CONT) |
- 0.3 to 7.0
- 0.3 to 7.0
5.0 |
V
V
A |
ESD Voltage(5)
Human Body Model
Machine Model
Charge Device Model
Corner Pins (1,9,17,25)
All Other Pins |
VESD1
VESD2 |
±2000
±200
±750
±500 |
V |
| Storage Temperature |
TSTG |
- 65 to 150 |
|
Operating Temperature
Ambient
Junction(6) |
TA
TJ
|
- 40 to 125
- 40 to 150
|
|
Peak Package Reflow Temperature During Reflow (7),(8)
Approximate Junction-to-Board Thermal Resistance(9) |
TPPRT
RJB |
Note 8
< 1.0 |
/W
|
Notes
1.Device will survive repetitive transient overvoltage conditions for durations not to exceed 500 ms @ duty cycle not to exceed 10%. External protection is required to prevent device damage in case of a reverse battery condition.
2.Exceeding the maximum input voltage on IN1, IN2, EN, INV, SLEW, D1, or D2 may cause a malfunction or permanent damage to the device.
3.Exceeding the pullup resistor voltage on the open drain SF pin may cause permanent damage to the device.
4.Continuous output current capability is dependent on sufficient package heatsinking to keep junction temperature 150.
5.ESD1 testing is performed in accordance with the Human Body Model (CZAP= 100 pF, RZAP= 1500 ), ESD2 testing is performed in accordance with the Machine Model (CZAP = 200 pF, RZAP= 0 ), and the Charge Device Model (CDM), Robotic (CZAP= 4.0pF).
6.The limiting factor is junction temperature, taking into account the power dissipation, thermal resistance, and heat sinking provided. Brief non-repetitive excursions of junction temperature above 150C can be tolerated provided the duration does not exceed 30 seconds maximum. (Non-repetitive events are defined as not occurring more than once in 24 hours.)
7.Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device.
8. Freescale's Package Reflow capability eets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow Temperature and Moisture Sensitivity Levels (MSL),Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics.
9.Exposed heatsink pad plus the power and ground pins comprise the main heat conduction paths. The actual RJB(junction-to-PC board) values will vary depending on solder thickness and composition and copper trace thickness and area. Maximum current at maximum die temperature represents ~16 W of conduction loss heating in the diagonal pair of output MOSFETs. Therefore, the RJA must be < 5.0/W for maximum current at 70 ambient. Module thermal design must be planned accordingly.
Description5.0 A Throttle Control H-Bridge
The 33926 is a monolithic H-Bridge Power IC designed primarily for automotive electronic throttle control, but is applicable to any low-voltage DC servo motor control application within the current and voltage limits stated in this specification.
The 33926 is able to control inductive loads with currents up to 5.0 A peak. RMS current capability is subject to the degree of heatsinking provided to the device package. Internal peak-current limiting (regulation) is activated at load currents above 6.5 A ±1.5 A.Output loads can be pulse width modulated (PWM-ed) at frequencies up to 20 kHz. A load current feedback feature provides a proportional (0.24% of the load current) current output suitable for monitoring by a microcontroller's A/D input. AStatus Flag output reports undervoltage, overcurrent, and overtemperature fault conditions.
Two independent inputs of 33926 provide polarity control of two half-bridge totem-pole outputs. Two independent disable inputs are provided to force the H-Bridge outputs to tri-state (high impedance off-state). An input invert input changes the IN1 and IN2 inputs to LOW = true logic.
MC33926 Data Sheet
