33879_09 Datasheet, PDF (1/23 Pages) Freescale Semiconductor, Inc – Configurable Octal Serial Switch with Open Load Detect Current Disable

Freescale Semiconductor
Technical Data
Configurable Octal Serial Switch
with Open Load Detect Current
Disable
Document Number: MC33879
Rev. 8.0, 10/2009
33879
33879A
The 33879 device is an 8-output hardware configurable, high side /
low side switch with 16-bit serial input control. Two of the outputs may
be controlled directly via a microprocessor for PWM applications. The
33879 incorporates SMARTMOS technology, with CMOS logic,
bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33879
controls various inductive, incandescent, or LED loads by directly
interfacing with a microcontroller. The circuit’s innovative monitoring
and protection features include very low standby currents, cascade
fault reporting, internal + 45 V clamp voltage for low side configuration,
- 20 V high side configuration, output specific diagnostics, and
independent over-temperature protection.
HIGH SIDE/ LOW SIDE SWITCH
Features
• Designed to operate 5.5 V < V_PWR < 26.5 V
• 16-Bit SPI for control and fault reporting, 3.3 V/5.0 V compatible
• Outputs are current limited (0.6 A to 1.2 A) to drive incandescent
lamps
• Output voltage clamp, +45 V (Low Side) and -20 V (High Side)
during inductive switching
• On/Off control of open load detect current (LED application)
• Internal reverse battery protection on V_PWR
• Loss of ground or supply will not energize loads or damage IC
• Maximum 5.0 μA I_PWR standby current at 13 V V_PWR
• R_DS(ON) of 0.75 Ω at 25°C typical
• Short-circuit detect and current limit with automatic retry
• Independent over-temperature protection
• Pb-free packaging designated by suffix code EK
DWB SUFFIX EXPOSED PAD
EK SUFFIX (PB-FREE)
98ARL10543D
32-PIN SOICW
ORDERING INFORMATION
Device
MC33879EK/R2
Temperature
Range (T_A)
Package
MCZ33879EK/R2 -40°C to 125°C
MCZ33879AEK/R2
32 SOICW-EP
MCU
A0
MOSI
SCLK
CS
MISO
PWM1
PWM2
VPWR
+5.0 V
33879
VDD VPWR
D1
D2
D3
EN
D4
DI
S1
SCLK
S2
CS
S3
S4
DO
IN5
D5
IN6
D6
D7
D8
S5
GND
S6
S7
S8
VBAT
M
High-Side Drive
H-Bridge Configuration
VBAT _VBAT
Low-Side Drive
Figure 1. 33879 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2009. All rights reserved.