Industrial Converter and Protector IC

AM460

analog microelectronics

April 2003

10/18

• When using current output pin IOUT (in conjunction with the external transistor) the value of V

min

max

CC

L

OUT

S

V

R

I

V

+

≥

(10)

dependent on the selected reference voltage:

V

1

min

+

≥

REF

CC

V

V

(11)

The working range resulting from Equation 10 is described in Figure 4. Example calculations and typical values

for the external components can be found in the example applications from page 12 onwards.

Connecting OP2 as a current source

The additional operational amplifier OP2 can easily be connected up as a constant current source. Using the cir-

V

R

6

35

V

CCmin

= 6V

R

Lmax

= 600Ω

I

18

R

VV

I

L

SCCmin

OUTmax

≤

−

24

12

600

Operating range

0

300

0

Figure 4: Working range in conjunction with the load resistor

V

BG

AM460

OP2

1

R

SET

OP2 connected as current source

2

I

S

Figure 5: Connecting up a constant current source