mc33879a Freescale Semiconductor, Inc, mc33879a Datasheet

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mc33879a

Manufacturer Part Number
mc33879a
Description
Configurable Octal Serial Switch With Open Load Detect Current Disable
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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Freescale Semiconductor
Advance Information
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
Configurable Octal Serial Switch
with Open Load Detect Current
Disable
be controlled directly via 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 overtemperature protection.
Features
low-side switch with 16-bit serial input control. Two of the outputs may
The 33879 device is an 8-output hardware-configurable, high-side /
• Designed to Operate 5.5 V < V
• 16-Bit SPI for Control and Fault Reporting, 3.3 V / 5.0 V
• Outputs Are Current Limited (0.6 A to 1.2 A) to Drive
• Output Voltage Clamp, + 45 V (Low Side) and - 20 V (High Side)
• On/Off Control of Open Load Detect Current (LED Application)
• Internal Reverse Battery Protection on V
• Loss of Ground or Supply Will Not Energize Loads or Damage IC
• Maximum 5.0 PA I
• R
• Short Circuit Detect and Current Limit with Automatic Retry
• Independent Overtemperature Protection
• Pb-Free Packaging Designated by Suffix Code EK
Compatible
Incandescent Lamps
During Inductive Switching
DS(ON)
of 0.75 : at 25qC Typical
PWR
Standby Current at 13 V V
MCU
PWR
PWM1
PWM2
MOSI
MISO
SCLK
Figure 1. 33879 Simplified Application Diagram
A0
CS
< 26.5 V
+5.0 V
PWR
EN
DI
SCLK
CS
DO
IN5
IN6
GND
VDD VPWR
V PWR
PWR
33879
D1
D2
D3
D4
S1
S2
S3
S4
D5
D6
D7
D8
S5
S6
S7
S8
V BAT
M
MCZ33879AEK/R2
MCZ33879EK/R2
MC33879EK/R2
H-Bridge Configuration
Device
High-Side Drive
Low-Side Drive
V BAT
HIGH SIDE/ LOW SIDE SWITCH
ORDERING INFORMATION
DWB SUFFIX EXPOSED PAD
V BAT
EK SUFFIX (PB-FREE)
33879
33879A
Document Number: MC33879
32-PIN SOICW
98ARL10543D
-40
Temperature
Range (T
q
C

to 125
A
)
q
C
Rev 6.0, 6/2007
32 SOICW-EP
Package

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mc33879a Summary of contents

Page 1

... SCLK MISO PWM1 PWM2 Figure 1. 33879 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2007. All rights reserved. < 26.5 V MC33879EK/R2 PWR MCZ33879EK/R2 PWR MCZ33879AEK/R2 V PWR V BAT +5 ...

Page 2

DEVICE VARIATIONS Table 1. Device Variations (Optional Table) Freescale Part No. 33879 33879A 33879 2 DEVICE VARIATIONS V Supply Voltage PWR -16 to 40V -16 to 45V Reference Location Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 3

SCLK DI DO SPI and Interface EN Logic ~110 k: SPI Bit 0 IN5 Enable ~50 PA SPI Bit 4 IN6 ~ Exposed Pad Figure 2. 33879 Simplified Internal Block Diagram Analog ...

Page 4

PIN CONNECTIONS Table 2. 33879 Pin Definitions A functional description of each pin can be found in the Pin Pin Number Pin Name Function 1 GND Ground 2 V Input Output 24, ...

Page 5

Table 2. 33879 Pin Definitions (continued) A functional description of each pin can be found in the Pin Pin Number Pin Name Function 23 S3 Output 26 D4 Output 27 S4 Output 28 D7 Output 29 S7 Output 31 V ...

Page 6

ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 3. 33879 Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. Ratings ELECTRICAL RATINGS (1) V Supply Voltage DD ...

Page 7

STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics Characteristics noted under conditions 3 Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic POWER INPUT Supply Voltage Range Fully Operational 33879 33879A Supply Current ...

Page 8

ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 3 Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic POWER OUTPUT Drain-to-Source ON Resistance (I = 0.350 ...

Page 9

Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 3 Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic DIGITAL INTERFACE (9) Input Logic High-Voltage Thresholds (9) Input Logic Low-Voltage Thresholds IN5, ...

Page 10

ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 3 Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic POWER OUTPUT TIMING (11) Output Slew ...

Page 11

Table 5. Dynamic Electrical Characteristics (continued) Characteristics noted under conditions 3 Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic (14) DIGITAL INTERFACE TIMING Recommended Frequency of SPI Operation Falling Edge of CS ...

Page 12

ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS CS 0 LEAD 0.7 V SCLK DO(EN 33879 SCLK ...

Page 13

TYPICAL ELECTRICAL CHARACTERISTICS PWR 19 33879 33879A 15 14 -40 - Ambient Temperature ( A, Figure 8. I vs. Temperature PWR 140 T = 25qC A 120 100 ...

Page 14

ELECTRICAL CHARACTERISTICS TYPICAL ELECTRICAL CHARACTERISTICS 140 PWR 120 100 -40 - Ambient Temperature ( A, Figure 13. Open Load Detection Current at Threshold 33879 14 5.5 V PWR ...

Page 15

CS PIN The system MCU selects the 33879 with which to communicate through the use of the chip select low on enables the data output (DO) driver and allows CS data to be transferred from the MCU to the 33879 ...

Page 16

FUNCTIONAL DESCRIPTION MCU INTERFACE DESCRIPTION S1– S8 PINS The pins are the source outputs of the 33879. For high-side drive configurations, the source pins are connected directly to the load. In low-side drive configurations, the source is ...

Page 17

MOSI SCLK MISO MC68HCxx Microcontroller with SPI Interface A Parallel B Ports C Figure 17. Parallel Input SPI Control On each SPI communication, a 16-bit command word is sent to the 33879 and a 16-bit status word is received from ...

Page 18

FUNCTIONAL DESCRIPTION SPI DEFINITION Serial Output (DO) Pin Reports Overtemperature Fault reported by serial output (DO) pin. Overcurrent DO pin reports short to battery/supply or overcurrent condition. Output ON Open Load Fault Not reported. Output OFF Open Load Fault DO ...

Page 19

POWER SUPPLY The 33879 device has been designed with ultra-low Sleep mode currents. The device may enter Sleep mode via the EN pin or the V pin. In the Sleep mode ( current consumed by the V ...

Page 20

FUNCTIONAL DESCRIPTION DEVICE OPERATION An output OFF open load fault is indicated when the drain- to-source voltage is less than the output threshold voltage ( 2 4.0 V. Hence, the 33879 will declare flt-th OUT( ) ...

Page 21

Important: For the most current revision of the package, visit www.freescale.com and perform a keyword search using the “98A” drawing number listed below. Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGING PACKAGE DIMENSIONS DWB SUFFIX EK (Pb-FREE) SUFFIX 32-LEAD SOICW ...

Page 22

PACKAGING PACKAGE DIMENSIONS 33879 22 PACKAGE DIMENSIONS (CONTINUED) Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 23

REVISION DATE DESCRIPTION OF CHANGES • Page 2, Figure 1; An exposed pad internal block and EP pin have been added to the internal block 2/2006 5.0 diagram. • Page 4, Table 1; Table 1 has been updated to reflect ...

Page 24

... Freescale Semiconductor was negligent regarding the design or manufacture of the part. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc., 2007. All rights reserved. ...

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