6

operation with an overload condition. Note that the inductor

and causes an over-current trip. The converter dissipates very

little power with this method. The measured input power for the

conditions of Figure 4 is 2.5W.

The over-current function will trip at a peak inductor current

typical). The OC trip point varies mainly due to the

from the equation above with:

,

where

∆I is the output inductor ripple current.

For an equation for the ripple current see the section under

component guidelines titled ‘Output Inductor Selection’.

A small ceramic capacitor should be placed in parallel with

presence of switching noise on the input voltage.

Output Voltage Program

The output voltage of a HIP6014 converter is programmed

voltage identification (VID) pins program an internal voltage

reference (DACOUT) with a TTL-compatible 5-bit digital-to-

analog converter (DAC). The level of DACOUT also sets

the PGOOD and OVP thresholds. Table 1 specifies the

DACOUT voltage for the 32 different combinations of

connections on the VID pins. The output voltage should not

be adjusted while the converter is delivering power.

0A

0V

TIME (20ms/DIV.)

5A

10A

15A

2V

4V

FIGURE 4. OVER-CURRENT OPERATION

I

PEAK

I

OCSET

R

OCSET

•

r

DS ON

()

---------------------------------------------------

=

I

PEAK

I

OUT MAX

()

∆I

() 2

⁄

+

>

TABLE 1. OUTPUT VOLTAGE PROGRAM

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

PIN NAME

NOMINAL OUTPUT

VOLTAGE DACOUT

VID4

VID3

VID2

VID1

VID0

VID4

VID3

VID2

VID1

VID0

01111

0

11111

0

01110

0

11110

2.1

01101

0

11101

2.2

01100

0

11100

2.3

01011

0

11011

2.4

01010

0

11010

2.5

01001

0

11001

2.6

01000

0

11000

2.7

00111

0

10111

2.8

00110

0

10110

2.9

00101

1.80

10101

3.0

00100

1.85

10100

3.1

00011

1.90

10011

3.2

00010

1.95

10010

3.3

00001

2.00

10001

3.4

00000

2.05

10000

3.5

HIP6014