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Table Of Contents

16 Output Switch with SPI Control

Document Number: MC33996

Rev. 8.0, 8/2008

Freescale Semiconductor

Advance Information

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

16 Output Switch with SPI

Control

The 33996 is a 16-output low side switch with a 24-bit serial input

control. It is designed for a variety of applications including inductive,

incandescent, and LED loads. The Serial Peripheral Interface (SPI)

provides both input control and diagnostic readout. A Pulse Width

Modulation (PWM) control input is provided for pulse width

modulation of multiple outputs at the same duty cycle. A dedicated

reset input provides the ability to clear all internal registers and turn

all outputs off.

The 33996 directly interfaces with micro controllers and is

compatible with both 3.3 and 5.0V CMOS logic levels. The 33996, in

effect, serves as a bus expander and buffer with fault management

features that reduce the MCU’s fault management burden.

Features

• Designed to operate 5.0V < V

PWR

< 27V

• 24 Bit SPI for control and fault reporting, 3.3/5.0V compatible

• Outputs are current limited (0.9 to 2.5A) to drive incandescent

lamps

• Output voltage clamp of +50V during inductive switching

• On/Off control of open load detect current (LED application)

•V

PWR

standby current < 10μA

•R

DS(ON)

of 0.55Ω at 25°C typical

• Independent over-temperature protection

• Output selectable for PWM control

• Output ON short-to-V

BAT

and off short-to-ground /open detection

• Pb-free packaging designated by suffix code EK

Figure 1. 33996 Simplified Application Diagram

LOW SIDE SWITCH

33996

ORDERING INFORMATION

Device

Temperature

Range (T

)

Package

MC33996EK/R2

-40°C to 125°C 32 SOICW-EP

MCZ33996EK/R2

EK SUFFIX (PB-FREE)

98ARL10543D

32-PIN SOICW EXPOSED PAD

PWR

MCU

33996

LED

Lamp

Solenoid/Relay

Vdd

3.3 V/5.0 V

VDD VPWR

GND

OUT15

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

OUT9

OUT10

OUT11

OUT12

OUT13

OUT14

BAT

SOPWR

SOMOSI

PWMPWM

SIMISO

CSCS

SCLKSCLK

RSTRST

Summary of content (24 pages)

PAGE 1
Freescale Semiconductor Advance Information Document Number: MC33996 Rev. 8.0, 8/2008 16 Output Switch with SPI Control 33996 The 33996 is a 16-output low side switch with a 24-bit serial input control. It is designed for a variety of applications including inductive, incandescent, and LED loads. The Serial Peripheral Interface (SPI) provides both input control and diagnostic readout.
PAGE 2
IINTERNAL BLOCK DIAGRAM IINTERNAL BLOCK DIAGRAM VPWR OUT0 VDD PWM 10μA RST 25μA CS 10μA SCLK Input Buffers 10μA SI 10 μA SO SOPWR Serial D/O Line Driver Over-voltage Detect Voltage Regulator OVD VDD RB SFPDB SFL CS SCLK SI SO CSI CSBI GE OT SF OF Open Load Detect Enable SPI Interface Logic VDD Bias 50V Gate Control To Gates 1 to 15 OUT1-15 VRef ILimit RS 50μA Short and Open Load Detect GND (8) Over-temperature Detect From Detectors 1 to 15 Figure 2.
PAGE 3
PIN CONNECTIONS PIN CONNECTIONS 1 32 2 31 3 30 4 29 5 28 OUT15 OUT14 PWM OUT13 OUT12 6 27 RST 7 26 8 25 9 24 10 23 11 22 12 21 13 20 CS 14 19 OUT6 OUT7 15 18 16 17 GND GND GND GND SO OUT11 OUT10 SI OUT9 OUT8 OUT0 OUT1 SOPWR OUT2 OUT3 VPWR GND GND GND GND SCLK OUT4 OUT5 Figure 3. 33996 Pin Locations Table 1. Pin Definitions A functional description of each pin can be found in the Functional Pin Description section beginning on page 10.
PAGE 4
ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 2. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Rating Symbol Value Unit VPWR -1.5 to 50 V SOPWR -0.3 to 7.0 V VIN -0.3 to 7.0 V VD -0.3 to 45 V fSPI 6.
PAGE 5
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. STATIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions 3.1V ≤ SOPWR ≤ 5.5V, 5.0V ≤ VPWR ≤ 18V, -40°C ≤ TA ≤ 125°C unless otherwise noted. Where applicable, typical values noted reflect the parameter ‘s approximate value with VPWR = 13V, TA = 25°C. Characteristic Symbol Min Typ Max 5.0 – 27 – 4.0 8.
PAGE 6
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. STATIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions 3.1V ≤ SOPWR ≤ 5.5V, 5.0V ≤ VPWR ≤ 18V, -40°C ≤ TA ≤ 125°C unless otherwise noted. Where applicable, typical values noted reflect the parameter ‘s approximate value with VPWR = 13V, TA = 25°C. Characteristic Symbol Min Typ Max Unit VINLOGIC 0.8 – 2.2 V VINRST 0.8 – 2.2 V 2.0 10 30 -30 -10 -2.0 2.
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 4. DYNAMIC ELECTRICAL CHARACTERISTICS Characteristics noted under conditions of 3.1 V ≤ SOPWR ≤ 5.5 V, 5.0 V ≤ VPWR ≤ 18 V, -40°C ≤ TA ≤ 125°C unless otherwise noted. Where applicable, typical values reflect the parameter’s approximate average value with VPWR = 13 V, TA = 25°C. Characteristic Symbol Min Typ Max Unit 1.0 2.0 10 tDLY (ON) 1.0 2.0 10 μs t DLY(OFF) 1.0 4.
PAGE 8
ELECTRICAL CHARACTERISTICS TIMING DIAGRAM TIMING DIAGRAM CS 0.2 VDD t LAG t LEAD 0.7 VDD SCLK 0.2 VDD tSI(su) 0.7 VDD 0.2 VDD SI tSI(hold) MSB IN tSO(en) SO t SO(dis) t VALID 0.7 VDD 0.2 VDD MSB OUT LSB OUT VTri-State Figure 4.
PAGE 9
ELECTRICAL CHARACTERISTICS ELECTRICAL PERFORMANCE CURVES ELECTRICAL PERFORMANCE CURVES 12 1.4 VPWR @ 13V VPWR @ 13V 1.2 10 1.0 RDS(ON) (Ω) IPWR Current into VPWR Pin (mA) 14 8 6 4 0.8 0.6 0.4 2 -40 -25 0 25 50 75 100 125 -40 -25 TA, Ambient Temperature (°C) IPWR Current into VPWR Pin (uA) IPWR Current into VPWR Pin (µA) 25 50 75 100 125 TA, Ambient Temperature (°C) Figure 5. IPWR vs. Temperature 1.4 14 1.2 12 0 Figure 7. RDS(ON) vs.
PAGE 10
FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION FUNCTIONAL DESCRIPTION The 33996 is designed and developed for automotive and industrial applications. It is a 16 output power switch having 24 bit serial control. The 33996 incorporates SMARTMOS technology having CMOS logic, bipolar / MOS analog circuitry, and independent DMOS power output transistors. Many benefits are realized as a direct result of using this mixed technology.
PAGE 11
FUNCTIONAL DESCRIPTION OPERATIONAL MODES OPERATIONAL MODES On each SPI communication, a 24 bit command word is sent to the 33996 and 24 bit fault word is received from the 33996. The Most Significant Bit (MSB) is sent and received first. Command Register Definition: 0 = Output Command Off 1 = Output Command On SO Definition: 0 = No fault 1 = Fault Table 5. Fault Operation Serial Output (SO) Pins Reports Over-temperature Fault reported by Serial Output (SO) pin.
PAGE 12
FUNCTIONAL DESCRIPTION OPERATIONAL MODES Diagnostics is treated in a similar manner — outputs with a fault will feedback (via SO) to the MCU a logic [1], while normal operating outputs will provide a logic [0]. The 33996 may be controlled and provide diagnostics using a daisy chain configuration or in parallel mode. Figure 10 shows the daisy chain configuration using the 33996. Data from the MCU is clocked daisy chain through each device while the Chip Select bit (CS) is commanded low by the MCU.
PAGE 13
LOGIC COMMANDS AND REGISTERS INTRODUCTION LOGIC COMMANDS AND REGISTERS INTRODUCTION The 33996 provides flexible control of 16 low-side driver outputs. The device allows PWM and ON /OFF control through the use of several 24 bit input command words. This section describes the logic operation and command registers of the 33996. The 33996 message set consists of seven messages as shown in Table 6.
PAGE 14
LOGIC COMMANDS AND REGISTERS INTRODUCTION on output drain-to-source voltage (VDS ) > 2.7V. This feature is designed to provide protection to loads that experience more than expected currents and require fast shutdown. The 33996 is designed to operate in both modes with full device protection. OR control to occur, the PWM Enable bit must be set to logic [1]. On/Off Control Bit On/Off Control Bit PWM ENABLE REGISTER The PWM Enable register determines the outputs that are PWM controlled.
PAGE 15
TYPICAL APPLICATIONS INTRODUCTION TYPICAL APPLICATIONS Power Consumption The 33996 has been designed with one Sleep mode and one Operational mode. In Sleep mode (SOPWR ≤ 2.0V) the current consumed by the VPWR pin is less than 10μA. To place the 33996 in Sleep mode, turn all outputs OFF and remove power from the SOPWR pin. During normal operation, 500μA is drawn from the SOPWR supply and 8.0mA from the VPWR supply.
PAGE 16
TYPICAL APPLICATIONS INTRODUCTION calculated by multiplying the current area under the current curve (IA) times the clamp voltage (VCL) (see Figure 13). Characterization of the output clamps, using a single pulse non-repetitive method at 0.3A, indicates the maximum energy to be 50mJ at 150°C junction temperature per output.
PAGE 17
PACKAGING PACKAGE DIMENSIONS PACKAGING PACKAGE DIMENSIONS Important: For the most current package revision, visit www.freescale.com and search on keyword for 98A number listed below.
PAGE 18
PACKAGING PACKAGE DIMENSIONS (CONTINUED) PACKAGE DIMENSIONS (CONTINUED) EK SUFFIX (PB-FREE) 32-PIN SOICW EP 98ARL10543D REVISION C 33996 18 Analog Integrated Circuit Device Data Freescale Semiconductor
PAGE 19
PACKAGING PACKAGE DIMENSIONS (CONTINUED) EK SUFFIX (PB-FREE) 32-PIN SOICW EP 98ARL10543D REVISION C 33996 Analog Integrated Circuit Device Data Freescale Semiconductor 19
PAGE 20
ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) ADDITIONAL DOCUMENTATION 33996EK THERMAL ADDENDUM (REV 2.0) Introduction This thermal addendum is provided as a supplement to the MC33996 technical datasheet. The addendum provides thermal performance information that may be critical in the design and development of system applications. All electrical, application, and packaging information is provided in the datasheet.
PAGE 21
ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) A OUT0 OUT1 SOPWR OUT2 OUT3 VPWR GND GND GND GND SCLK OUT4 OUT5 CS OUT6 OUT7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 OUT15 OUT14 PWM OUT13 OUT12 RST GND GND GND GND SO OUT11 OUT10 SI OUT9 OUT8 33996 Pin Connections 32-Pin SOICW EP 0.65 mm Pitch 11.0mm x 7.5mm Body 4.6 x 5.7mm exposed pad Device on Thermal Test Board Material: Outline: Figure 15. Thermal Test Board Table 8.
PAGE 22
ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) 80 Thermal Resistance [ºC/W] 70 60 50 40 30 x 20 RθJA [°C/W] 10 0 0 300 600 Heat Spreading Area A [mm²] Figure 16. Device on Thermal Test Board RθJA Thermal Resistance [ºC/W] 100 10 x 1 0.1 1.00E-03 1.00E-02 1.00E-01 RθJA [°C/W] 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 Time[s] Figure 17.
PAGE 23
REVISION HISTORY REVISION HISTORY REVISION DATE DESCRIPTION OF CHANGES 3 12/2005 • • Implemented Revision History page Changed Static Electrical Table, IPWR (SS) Min characteristics, from “-10” to “-”. 4 9/2006 • Added Thermal Addendum 4/2007 • • Minor labeling corrections to 33996 Simplified Internal Block Diagram on page 2 - changed pins SCLK to CS and CSB to SCLK. Removed Peak Package Reflow Temperature During Reflow (solder reflow) parameter from MAXIMUM RATINGS on page 4.
PAGE 24
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