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PDF MAX4896 Data sheet ( Hoja de datos )
| Número de pieza | MAX4896 | |
| Descripción | 8-Channel Relay/Load Driver | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3843; Rev 1; 6/07
Space-Saving, 8-Channel Relay/Load Driver
www.datasheet4u.com
General Description
The MAX4896 8-channel relay and load driver is
designed for medium voltage applications up to 50V.
This device is offered in a 20-pin, 5mm x 5mm TQFN
package, resulting in substantial board space savings.
The MAX4896 8-channel relay driver offers built-in
inductive kickback protection, drive for latching/
nonlatching or dual-coil relays, and open-load and
short-circuit fault detection.The MAX4896 also protects
against overcurrent conditions. Each independent
open-drain output features a 3Ω (typ) on-resistance,
and is guaranteed to sink 200mA of load current
(VS ≥ 4.5V).
A built-in overvoltage protection clamp handles kick-
back-voltage transients, which are common when dri-
ving inductive loads. Thermal-shutdown circuitry shuts
off all outputs (OUT_) when the junction temperature
exceeds +160°C. The MAX4896 employs a reset input
that allows the user to turn off all outputs simultaneously
with a single control line.
The MAX4896 includes a 10MHz SPI™-/QSPI™-/
MICROWIRE™-compatible serial interface. The serial
interface is compatible with TTL-/CMOS-logic voltage
levels and operates with a single +2.7V to +5.5V sup-
ply. In addition, the SPI output data can be used for
diagnostics purposes including open-load and short-
circuit fault detection.
The MAX4896 is offered in the extended (-40°C to
+85°C) and automotive (-40°C to +125°C) operating
temperature ranges.
Typical Operating Circuit
Vcc = 2.7V TO 5.5V
0.1μF
VRELAY
INT
μC
PDCD
VS
FLAG
RESET
SCLK
CS
DIN
DOUT
MAX4896
OUT1
RELAY
COIL 1
VRELAY
OUT8
RELAY
COIL 8
SLPD GND PGND
Features
♦ Supports Up to 50V Continuous Drain-to-Source
Voltage
♦ Guaranteed Drive Current:
♦ VS ≥ 4.5V
200mA (All Channels On)
410mA (Individual Channels)
♦ VS ≤ 3.6V
100mA
♦ Built-In Output Clamp Protects Against Inductive
Kickback
♦ +2.7V to +5.5V Logic Supply Voltage
♦ RESET Input Turns Off All Outputs
Simultaneously
♦ Built-in Power-On Reset
♦ Automotive Temperature Range
(-40°C to +125°C)
♦ SPI-/QSPI-/MICROWIRE-Compatible Serial
Interface
♦ Serial Digital Output for Daisy Chaining and
Diagnostics
♦ FLAG Output for µP Interrupt
♦ Open-Load and Short-Circuit Detection and
Protection
♦ Thermal Shutdown
♦ Low 100µA (max) Quiescent Supply Current
♦ Space-Saving, 5mm x 5mm, 20-Pin TQFN Package
Industrial Equipment
White Goods
Power-Grid Monitoring
and Protection Equipment
Applications
Automotive Relay Control
ATE
Ordering Information
PART
TEMP
RANGE
MAX4896ETP+
-40°C to
+85°C
MAX4896ATP+
-40°C to
+125°C
*EP = Exposed paddle
+ Denotes a lead-free package.
PIN-
PACKAGE
20 TQFN-EP*
(5mm x 5mm)
20 TQFN-EP*
(5mm x 5mm)
PACKAGE
CODE
T2055-5
T2055-5
Pin Configuration appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
Space-Saving, 8-Channel Relay/Load Driver
www.datasheet4u.com
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
12
11 ALL LOGIC INPUTS = VS
10
9
8 TA = +85°C
7 TA = +125°C
6
5
4
3 TA = +25°C
2
1 TA = -40°C
0
2.7 3.1 3.5 3.9 4.3 4.7
SUPPLY VOLTAGE (V)
5.1
5.5
ON-RESISTANCE
vs. TEMPERATURE
8
IOUT_SINK = 50mA
7
6 VS = 2.7V
5 VS = 3.3V
4
VS = 5V
3
2 VS = 5.5V
1
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OUTPUT OFF LEAKAGE CURRENT
vs. SUPPLY VOLTAGE
100
90
80
70
60 VOUT = 50V
50
VOUT = 24V
40
30
VOUT = 12V
20
10
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. fCLK
6.0
5.5 fDIN = 0.5 x fCLK
5.0
4.5 VS = 5V
4.0 VS = 3.3V
3.5
3.0
2.5
2.0
0.1
1
fCLK (MHz)
VS = 2.7V
10
ON-RESISTANCE
vs. TEMPERATURE
8
IOUT_SINK = 100mA
7
VS = 2.7V
6
5
VS = 3.3V
VS = 5V
4
3 VS = 5.5V
2
1
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OUT LEAKAGE CURRENT
vs. TEMPERATURE
100
PDCD = VS
10
1 VOUT = 50V
0.1 VOUT = 24V
0.01
VOUT = 12V
0.001
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
ON-RESISTANCE
vs. SUPPLY VOLTAGE
7.0
6.5
6.0
5.5
IOUT_SINK = 100mA
5.0
4.5
4.0
3.5
3.0
2.5 IOUT_SINK = 50mA
2.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1
SUPPLY VOLTAGE (V)
5.5
POWER-ON RESET VOLTAGE
vs. TEMPERATURE
2.14
2.12
2.10
2.08
2.06
2.04
2.02
2.00
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
INPUT LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________ 5
5 Page 
Space-Saving, 8-Channel Relay/Load Driver
www.datasheet4u.com
DIN
VS 0.1μF
DEVICE 1
DIN
VS
DOUT
MAX4896
OUT1
SCLK
SCLK
CS
OUT8
GND PGND
CS
Figure 3. Daisy-Chain Configuration
VS
RESET
DIN
DOUT
SCLK
CS
FLAG
SPI/CONTROL
INTERFACE
8-BIT
LATCH
OVERTEMPERATURE
PROTECTION
GND
VS 0.1μF
DEVICE 2
DIN
VS
DOUT
MAX4896
OUT1
SCLK
CS
OUT8
GND PGND
PDCD
SPLD
CLAMP
GATE CONTROL
AND CURRENT
LIMITING
OPEN / SHORT
DETECT
PGND
Functional Diagram
OUT1
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
MAX4896
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX4896.PDF ] | |
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