214

Functional Pin Descriptions

VSEN1 (Pin 22)

This pin is connected to the PWM converter’s output voltage.

The PGOOD and OVP comparator circuits use this signal to

report output voltage status and for over-voltage protection.

OCSET1 (Pin 23)

point according to the following equation:

An over-current trip cycles the soft-start function. Sustaining

an over-current for 2 soft-start intervals shuts down the IC.

Additionally, OCSET1 is an output for the inverted FAULT

signal (FAULT). If a fault condition causes FAULT to go high,

OCSET1 will be simultaneously pulled to ground though an

Slew Rate

SR

COMP = 10pF

-

6

-

V/

µs

PWM CONTROLLER GATE DRIVER

Upper Drive Source

-

1

-

A

Upper Drive Sink

-

1.7

3.5

Ω

Lower Drive Source

-

1

-

A

Lower Drive Sink

-

1.4

3.0

Ω

PROTECTION

VSEN1 Rising

112

115

118

%

FAULT Sourcing Current

10

14

-

mA

OCSET1 Current Source

170

200

230

µA

Soft-Start Current

-11

-

µA

Chip Shutdown Soft-Start Threshold

--

1.0

V

POWER GOOD

VSEN1 Rising

108

-

110

%

VSEN1 Rising

92

-

94

%

Upper/Lower Threshold

-

2

-

%

PGOOD Voltage Low

-

-

0.5

V

Electrical Specifications

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Typical Performance Curves

FIGURE 5. BIAS SUPPLY CURRENT vs FREQUENCY

10

100

1000

SWITCHING FREQUENCY (kHz)

10

100

1000

TO +12V

100

200

300

400

500

600

700

800

900 1000

0

20

40

60

80

100

SWITCHING FREQUENCY (kHz)

I

PEAK

I

r

DS ON

()

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

=

HIP6017