NJM37770D3# NJR, NJM37770D3# Datasheet - Page 9

• Manufacturer Part Number: NJM37770D3#
• Description: IC STEPPER MOTOR DRIVER 16-DIP
• Manufacturer: NJR

Specifications of NJM37770D3#

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 1.3A
• Voltage - Load: 10 V ~ 55 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -20°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.325", 8.25mm), 12 Leads + 2 Fins
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NJM#37770D3; NJM#37770D3

Heatsinking
must be carefully considered.
printed circuit board (see figure 8) or by applying an external heatsink type V7 or V8, see figure 10.
heatsinks of the type V7, V8, or a 20 cm
must be connected to electrical ground.
forced-air cooling may be available to reduce the temperature rise of the circuit.
Ver.2006-04-11
The junction temperature of the chip highly effects the lifetime of the circuit. In high-current applications, the heatsinking
The Rth
The diagram in figure 15 shows the maximum permissible power dissipation versus the ambient temperature in °C, for
For motor currents higher than approx 600 mA, some form of heatsinking is recommended to assure optimal reliability.
The diagrams in figures 14 and 15 can be used to determine the required heatsinking of the circuit. In some systems,
Figure 10. Heatsinks, Staver, type V7 and V8 by Columbia-Staver UK
j-a
of the NJM37770 can be reduced by soldering the ground pins to a suitable copper ground plane on the
a) Staver V7
2
copper area respectively. Any external heatsink or printed circuit board copper
b) Staver V8
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