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New Japan Radio

NJM3545TA2 Datasheet Preview

NJM3545TA2 Datasheet

UNIVERSAL SINK DRIVER

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UNIVERSAL SINK DRIVER
NJM3545
s GENERAL DESCRIPTION
s PACKAGE OUTLINE
NJM3545 is a bipolar universal high-current highly protected
low side driver with transparent input and 2000mA continuous
-current sink capability. A high-level input activates the output.
The driver is equipped with extensive electrical protection;
such as over current protection and thermal protection,
which makes the device virtually indestructible.
Furthermore it can detect open circuit and short circuit to ground.
A special feature is the Error indicating output function pin
which signals to the host system if the protection or the load
check functions is activated.
The NJM3545 and NJM3548 are complementary drivers and
have similar data.
NJM3545TA2
s FEATURES
• 2000mA continuous-output current
• Short circuit to VCC protection
• Error signal to host system
• Open circuit detection
• Short circuit to ground detection
• Thermal protection
• Built-in protection diodes
• Package TO-220 (5-pin)
s BLOCK DIAGRAM
NJM3545
To logic
Input
Supply
Voltage reference
Output
Error
QS
R
Thermal
protection
Short-circuit to
Vcc protection
Short-circuit to
GND detection
Open circuit
detection
GND
Figure 1. Block Diagram




New Japan Radio

NJM3545TA2 Datasheet Preview

NJM3545TA2 Datasheet

UNIVERSAL SINK DRIVER

No Preview Available !

s PIN CONFIGURATION
NJM3545
5
Input
4
Error
3
GND
2
Output
1
Supply
Figure 2. Pin description
s PIN DESCRIPTION
TO-220 Symbol Description
1
Supply Supply voltage. Nominally 5 V to 40 V.
2
Output Output pin. Current flows from supply through the load into the pin. Nominal current is 8 mA to 2 A.
3
GND Ground supply.
diode are bonded to a separate pin.
4
Error Error indicating pin. Sinks current to ground if the protection and/or detection circuitry is activated.
Note: the current must be externally limited to 8 mA.
5
Input TTL compatible input. A LOW input signal turns the output transistor off and a HIGH input turns it on.
Output
voltage
Vcc
3.5 V
2.1 V
NJM3545
Active output
Overload or short
circuit to Vcc Error
Undefined area
Normal operation
Undefined area
0.6 V
0.2 V
Short circuit to GND error
IOMIN
(min 0.5 mA, max 8 mA)
I OS
Output
current
(min 2 A, max 4.5 A)
Figure 3. Error state vs. output voltage and output current, active
output (2.0 VIN VCC), 5 V < VCC < 40 V, - 40°C <TJ < +100°C
Output
voltage
100% Vcc
70% Vcc
50% Vcc
NJM3545
Inactive output
Normal operation
Undefined area
Short circuit to GND Error
0% Vcc
Figure 4. Error state vs. output voltage,
inactive output (0 V VIN 0.8 V), 5 V
VCC 40 V, - 40°C < TJ < +100°C


Part Number NJM3545TA2
Description UNIVERSAL SINK DRIVER
Maker New Japan Radio
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