29
462
+ 5 V D C I n p u t
The IB462H requires an external reg5VDC ±5% power supply. The supply is
connected between pin 5 (+5VDC Supply) and Pins 15, 16 (Power Ground).
The +5VDC supply ground and the motor supply ground should not be connected
together at the power supplies. The common ground connection between the motor
power supply and the +5VDC supply should be made at the ground pin of the
additional electrolytic capacitor used for the motor supply (See figure 1.7.1).
R e q u i r e d C a p a c i t o r
A 22 microfarad 10V tantalum capacitor must be placed as close to the IB462H as
possible between the +5VDC input pin 5 and ground (See figure 1.7.1 for PCB
layout example).
I n t e r f a c i n g t h e C u r r e n t A d j u s t I n p u t
The output current of the IB462H is controlled by applying a voltage to pin 1
of the hybrid. The output current is set as follows:
Below is a table illustrating the Current Adjust reference voltage to output
current relationship. Figure 1.7.2 illustrates a voltage divider circuit that can
be used to set the current adjust.
EXAMPLE:
Per Phase Output Current = 2 X Voltage applied to Pin 1
Voltage Applied to Pin 1 = 0.2V
0.2 X 2 = 0.4
Per Phase output current = 0.4 Amps
Table 1.7.1 Current Adjust ReferenceVoltage/Output Current
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