NTE1750
Integrated Circuit
Dual Switch−Mode Solenoid Driver
Description:
This NTE1750 is a monolithic integrated circuit in a 15−Lead Staggared SIP type package that incor-
porates all the functions for direct interfacing between digital circuitry and inductive loads. This device
is designed to accept standard micriprocessor logic levels at the inputs and can drive 2 solenoids.
The output current is completely controlled by means of a switching technique allowing very efficient
operation. Furthermore, it includes an enable input and dual supplies (for interfacing with peripherals
running at a higher voltage than the logic).
Features:
DHigh Current Capability
DHigh Voltage Operation
DHigh Efficiency Switch−Mode Operation
DRegulated Output Current
DSeparate Logic Supply
DThermal Protection
Applications:
DHammer Driver for Matrix Printers
DStepper Motor Driver
DElectromagnetic Controller
Absolute Maximum Ratings:
Supply Voltge, VS50V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Supply Voltage, VSS 12V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable and Input Voltage, VEN, Vi7V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference Voltage, Vref 7V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak Output Current (Each Channel), IO
Non−Repetitive (t = 100µs) 3.0A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repetitive (80% ON; 20% OFF, Ton = 10ms) 2.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Operation 2.0A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation (TC = +75°C), Ptot 25W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, TJ−40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg −40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, Junction−to−Case, TthJC 3°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistancde, Junction−to−Ambient, RthJA 35°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (VSS = 5V, VS = 26V, TJ = +25°C, Note 1 unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Voltage VS12 −46 V
Logic Supply Voltage VSS 4.75 −10.0 V
Quiescent Drain Current (From VSS) IdVS = 46V, Vi1 = Vi2 = VEN = L − − 4 mA
Quiescent Drain Current (From VS) Iss VSS = 10V − − 46 mA
Input Voltage Vi1, Vi2 Low −0.3 −+0.8 V
High 2.2 −7.0 V
Enable Input Voltage VEN Low −0.3 −+0.8 V
High 2.2 −7.0 V
Input Current Ii1, Ii2 Vi1 = Vi2 = L − − −100 µA
Vi1 = Vi2 = H − − 10 µA
Enable Input Current IEN VEN = L − − −100 µA
VEN = H − − 10 µA
Input Reference Voltage Vref1, Vref2 0.2 −2.0 V
Input Reference Current Iref1, Iref2 − − −5µA
Oscillation Frequency fOSC C = 3.0nF, R = 9.1kΩ−25 −kHz
Transconductance (Each Channel) IpVref = 1V 1.9 2.0 2.1 A/V
Vref
Total Output Voltage Drop (Each Channel) Vdrop IO = 2A, Note 2 −2.8 3.6 V
External Sensing Resistors Voltage Drop Vsense1,
Vsense2
− − 2 V
Note 1. L = Low, H = High
Note 2. Vdrop = VCE(sat) Q1 + VCE(sat) Q2.
VSS
Enable
Logic/VS
Output Low Ch 1
Input Signal Ch 1
GND
OSC RC Network
Input Ref Vltg Ch 1
Output High Ch 1
Input Ref Vltg Ch 2
Output Low Ch 2
15
14
13
12
Output High Ch 2
Current Sensing Ch 2
11 Input Signal Ch 2
10
9
8
7
6
5
Current Sensing Ch 14
3
2
1
Pin Connection Diagram
(Front View)
.699
(17.7)
.860
(21.8)
.150 (3.81) Dia Max
.791 (20.1)
.689
(17.5)
.069 (1.75)
.196 (4.99)
.110
(2.79)
.169
(4.29)
.008 (.203)
.050 (1.27) .200
(5.08)
151
