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Datasheet NJM3545 PDF ( 特性, スペック, ピン接続図 )

部品番号 NJM3545
部品説明 UNIVERSAL SINK DRIVER
メーカ New Japan Radio
ロゴ New Japan Radio ロゴ 
プレビュー
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NJM3545 Datasheet, NJM3545 PDF,ピン配置, 機能
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

1 Page



NJM3545 pdf, ピン配列
NJM3545
s FUNCTIONAL DESCRIPTION
The circuit NJM3545 is a low side driver capable of driving resistive or inductive loads not exceeding 2 A.
The driver has an error indicating function which generates an Error output signal when a fault condition has
occurred.
The circuits NJM3545 and NJM3548 are complementary drivers with equivalent functions and similar data.
NJM3545 is a sink driver and NJM3548 is a source driver.
Input stage
The output stage is switched on and off according to the status of the input. HIGH level activates the output. If the
input is left open, the circuit will accept it as a LOW level.
Output stage
The output stage contains a power transistor and two clamping diodes. The diodes are used for terminating line
transients from inductive loads. If the driver is inactive and the output is shorted to GND the driver will leak maxi-
mum
8 µA. See figure 18.
Protection circuit
The circuit contains two protection circuits:
• Overload and Short circuit protection
• Thermal protection
The
overload
and
short
circuit
protection
will
be
activated
at
I=
out
3.5
A
typically
at
T=
J
+25°C,
see
figure
20.
The output will be turned off immediately and latched to a high-impedance state after an overload or short circuit
has been detected.
5
Input
I Ref
1
CC
2
Output
GND
3
Figure 5. Input stage
3
Figure 6. Output stage
GND
Fault condition
Input
Normal
0 LOW
1 HIGH
VOUT Short to GND 0 LOW
1 HIGH
VOUT Short to VCC
0 LOW
1 HIGH
Open load
0 LOW
1 HIGH
Over temperature 0 LOW
TJ=130 °C
1 HIGH
Figure 7. Error table
Output
1 OFF
0 ON
1 OFF
0 ON
1 OFF
1 OFF
1 OFF
0 ON
1 OFF
1 OFF
Error
LOW=Error
HIGH=Normal
How to resume normal operation
1 HIGH
1 HIGH
0 LOW
0 LOW
1 HIGH
0 LOW
1 HIGH
0 LOW
1 HIGH
0 LOW
——
——
Remove fault condition.
Remove fault condition.
——
Turn off and on after fault condition is removed.
——
Attach proper load to output or turn off the driver.
——
Temperature is reduced to approx 120°C, or turn off the driver.


3Pages


NJM3545 電子部品, 半導体
NJM3545
s ELECTRICAL CHARACTERISTICS
At 5 V VCC 40 V, -40°C TJ +100°C. Typical values are given at VCC = 24 V, TJ = 25°C
Parameter
Symbol
General
Supply current
Thermal shutdown
ICC
TJS
Logic input
High level input voltage
Low level input voltage
High level input current
Low level input current
V
IH
VIL
IIH
IIH
Outputs
Error output saturation voltage
Output saturation voltage
Output current shutdown
Output current
(not detected as open circuit)
V
Err SAT
V
CE SAT
IOS
IOMIN
Output leakage current
IOL
Clamping diode forward voltage
Timing
Propagation time
Output high to low (50%),
Output low to high (50%),
Rise time (10 to 90%),
Fall time (90 to 10%),
tphl
tplh
tor
tof
Conditions
0 VIN 0.8
2.0 VIN VCC
0 VIN 0.8
I = 5 mA
Err
I =2 A
OUT
2.0 VIN VCC
2.0 VIN VCC
0 VVIN 0.8 V. Output = 0 V
IF = 2.0 A
IOUT = 2 A
Min
1.5
-
2.0
-0.3
-
-400
-
-
2.0
0.5
-8
-
-
-
-
-
Typ
4
+130
Max
7
-
-V
CC
- 0.8
9 20
--
0.2 1
1.4 1.8
3.2 4.5
28
-6 -2
1.5 1.8
1.5 3.0
0.5 1.0
0.2 0.5
0.2 0.5
Uni
mA
°C
V
V
µA
µA
V
V
A
mA
µA
V
µs
µs
µs
µs
s THERMAL CHARACTERISTICS
Parameter
Thermal resistance
Symbol
Conditions
Min Typ
Max
Unit
Rth j-c TO-220 package, junction to case
- 5 - °C/W
Rth J-A TO-220 package, junction to ambient
-
60
- °C/W
Notes:
1. Currents are defined positive if flowing into, and negative if flowing out of a terminal. Voltages are defined
between terminal and ground.
2. ESD testing according to Human Body Model (CZap = 100 pF, RZap = 1500 )

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