Freescale Semiconductor
Technical Data
Document order number:
MC33888
Rev. 4.0, 2/2006
Quad High-Side and Octal
Low-Side Switch for Automotive
The 33888 is a single-package combination of a power die with four
discrete high-side MOSFETs (two 10 mΩ and two 40 mΩ) and an
integrated IC control die consisting of eight low-side drivers (600 mΩ
each) with appropriate control, protection, and diagnostic features.
Programming, control, and diagnostics are accomplished using a
16-bit SPI interface. Additionally, each high-side output has its own
parallel input for pulse-width modulation (PWM) control if desired. The
low sides share a single configurable direct input.
The 33888 is available in two power packages.
Features
• Dual 10 mΩ High Side, Dual 40 mΩ High Side, Octal 600 mΩ
Low Side
• Full Operating Voltage of 6.0 V to 27 V
• SPI Control of High-Side Overcurrent Limit, High-Side Current
Sense, Output OFF Open Load Detection, Output ON/OFF
Control, Watchdog Timeout
• SPI Reporting of Program Status and Fault
• High-Side Analog Current Feedback with Selectable Ratio
• Enhanced 16 V Reverse Polarity V
PWR
Protection
33888
33888A
SOLID STATE RELAY
Bottom View
PNB SUFFIX
98ARL10544D
36-TERMINAL PQFN
Top View
FB SUFFIX
98ARH99043A
64-TERMINAL PQFP
ORDERING INFORMATION
Device
PC33888PNB/R2
PC33888APNB/R2
MC33888FB/R2
-40°C to 125°C
36 PQFN
64 PQFP
Temperature
Range (T
A
)
Package
V
PWR
+5.0 V
+5.0 V
8 x Relay or LED
33888
4
MCU
A/D
A/D
V
PWR
FS V
DD
IHS0:IHS3
LS4:LS11
ILS
RST
HS3
SPI
HS2
WDIN
HS1
CSNS2-3
HS0
CSNS0-1
FSI
GND
Loads
4
Figure 1. 33888 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., 2006. All rights reserved.
DEVICE VARIATIONS
DEVICE VARIATIONS
Table 1. Features Comparison: 33888 and 33888A
Parameter
Undervoltage Low-Side Output Shutdown
Low-Side Drain-to-Source ON Resistance
Recommended Frequency of SPI Operation
Symbol
V
PWRUV
R
DS(ON)
Condition
–
V
PWR
= 4.5 V;
V
DD
= 3.5 V
Extended Mode,
V
DD
= 3.4 V
33888
5.0 V
Not specified
Not specified
33888A
3.0 V
8.0
Ω
2.1 MHz
(max)
For details,
see page
10
13
16
f
SPI
33888
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VDD
VPWR
V
IC
I
UP
CS
SCLK
I
DWN
SO
SI
RST
WAKE
FS
IN0
IN1
IN2
IN3
ILS
SPI
3.0 MHz
Internal
Regulator
Over/Undervoltage
Protection
10 mΩ
Gate Driver
Selectable Current Limit
Open Load
HS0
Detection
Logic
Overtemperature
Detection
HS0
CSNS0-1
HS1
Gate Control and Fault 10 mΩ
HS1
Selectable Output Current
Recopy (Analog MUX)
Gate Control and Fault 40 mΩ
R
DWN
I
DWN
HS2
Selectable Output Current
Recopy (Analog MUX)
HS2
CSNS2-3
Gate Control and Fault 40 mΩ
HS3
V
IC
HS3
WDIN
Watchdog
Gate
Control
Clamp
Over-
temperature
I
LIM
Open Load
x8
FSI
LS4
LS5
LS6
LS7
LS8
LS9
LS10
LS11
GND
Figure 2. 33888 Simplified Internal Block Diagram
33888
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
TERMINAL CONNECTIONS
TERMINAL CONNECTIONS
Transparent Top View of Package
VPWR
2
LS11
LS10
GND
GND
VDD
LS9
LS8
LS7
LS6
LS5
LS4
SO
FS
1
36
35
WDIN
FSI
RST
WAKE
GND
IHS1
IHS0
CSNS0-1
34
33
32
31
30
29
28
HS2
14
CS
SCLK
SI
ILS
GND
IHS3
IHS2
CSNS2-3
16
17
18
19
20
21
22
23
13
12
11
10
9
8
7
6
5
4
3
15
GND
(Control Die)
Internally Connected to V
PWR
24
V
PWR
(Power Die)
25
HS3
26
HS1
27
HS0
Figure 3. 33888 Terminal Connections for PQFN
Table 2. 33888 Terminal Definitions for PQFN
A functional description of each terminal can be found in the Functional Terminal Description section beginning on
page 18.
Terminal
Number
1
2, 24
3
6
8
10
4, 11, 15,
20, 32
5
7
9
12
13
Terminal
Name
FS
VPWR
LS4
LS6
LS8
LS10
GND
LS5
LS7
LS9
LS11
VDD
Terminal
Function
Output
Input
Output
Formal Name
Fault Status
(Active Low)
Definition
This output terminal is an open drain indication that goes active low when
a fault mode is detected by the device.
Positive Power Supply These terminal connects to the positive power supply and are the source
input of operational power for the device.
Low-Side Output 4
Low-Side Output 6
Low-Side Output 8
Low-Side Output 10
Power Ground
Low-Side Output 5
Low-Side Output 7
Low-Side Output 9
Low-Side Output 11
Digital Drain Voltage
(Power)
These outputs are current and thermal overload protected. Maximum
steady state current through each of these outputs is 500 mA.
Ground
Output
These terminals serve as the ground for the source of the low-side output
transistors as well as the logic portion of the device.
These outputs are current and thermal overload protected. Maximum
steady state current through each of these outputs is 800 mA.
Input
This is an external input terminal used to supply power to the SPI circuit.
33888
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
TERMINAL CONNECTIONS
Table 2. 33888 Terminal Definitions for PQFN (continued)
A functional description of each terminal can be found in the Functional Terminal Description section beginning on
page 18.
Terminal
Number
14
16
17
18
19
21
22
30
31
23
29
25
28
26
27
33
34
35
36
Terminal
Name
SO
CS
SCLK
SI
ILS
IHS3
IHS2
IHS0
IHS1
CSNS2 - 3
CSNS0 - 1
HS3
HS2
HS1
HS0
WAKE
RST
FSI
WDIN
Terminal
Function
Output
Input
Input
Input
Input
Input
Formal Name
Serial Output
Chip Select
(Active Low)
Serial Clock
Serial Input
Low-Side Input
High-Side Input 3
High-Side Input 2
High-Side Input 0
High-Side Input 1
Current Sense 2-3
Current Sense 0-1
High-Side Output 3
High-Side Output 2
High-Side Output 1
High-Side Output 0
Wake
Reset (Active Low)
Fail-Safe Input
Watchdog Input
Definition
This is an output terminal connected to the SPI Serial Data Input terminal
of the MCU or to the SI terminal of the next device in a daisy chain.
This is an input terminal connected to a chip select output of a
microcontroller (MCU).
This input terminal is connected to the SCLK terminal of the master MCU,
which is a bit (shift) clock for the SPI port.
This input terminal is connected to the SPI Serial Data Output terminal of
the MCU from which it receives output command data.
This input terminal is used to directly control a number of the low-side
devices as configured by SPI.
These inputs may or may not be activated depending on the configured
state of the internal logic.
Output
These terminals deliver a ratioed amount of the high-side output current
that can be used to generate signal ground referenced output voltages for
use by the MCU.
Each terminal is the source of a 40 mΩ MOSFET high-side driver, which
delivers current through the connected loads.
Each terminal is the source of a 10 mΩ MOSFET high-side driver, which
delivers current through the connected loads.
This terminal is used to input a logic [1] signal in order to enable the
watchdog timer function.
This input terminal is used to initialize the device configuration and fault
registers, as well as place the device in a low current standby mode.
The Fail-Safe input terminal level determines the state of the outputs after
a watchdog timeout occurs. This terminal has an internal pullup.
This input terminal is a CMOS logic level input that is used to monitor
system operation.
Output
Output
Input
Input
Input
Input
33888
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
Embedded System
京公网安备 11010802033920号
EEWORLD
