HIP1012 Просмотр технического описания (PDF) - Intersil

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производитель

HIP1012

Dual Power Distribution Controller

Intersil 

HIP1012, HIP1012A

Electrical Specifications VDD = 12V, CVG = 0.01µF, CTIM = 0.1µF, RSENSE = 0.1Ω, CBULK = 220µF, ESR = 0.5Ω, TA = TJ = 0oC to 70oC,

Unless Otherwise Specified (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNITS

Gate Turn-On Time

Gate Turn-On Current

3X Gate Discharge Current

5V Under Voltage Threshold

3.3V Under Voltage Threshold

3.3/5VG High Voltage

tON5V

ION5V

3XdisI

5VVUV

3.3VVUV

3/5VG

CVG = 0.01µF

CVG = 0.01µF

CVG = 0.01µF, PWRON = Low

-

5

-

ms

8

10

12

µA

0.5

0.75

-

A

4.35

4.5

4.65

V

2.65

2.8

2.95

V

11.2

11.9

-

V

SUPPLY CURRENT AND IO SPECIFICATIONS

VDD Supply Current

VDD POR Rising Threshold

VDD POR Falling Threshold

Current Limit Time-Out

PWRON Pull-up Voltage

IVDD

TILIM

CTIM = 0.1µF

PWRN_V PWRON pin open

4

8

10

mA

9.5

10.0

10.7

V

9.3

9.8

10.3

V

16

20

24

ms

1.8

2.4

3.2

V

PWRON Rising Threshold

PWR_Vth

1.1

1.5

2

V

PWRON Hysteresis

PWR_hys

0.1

0.2

0.3

V

PWRON Pull-Up Current

PWRN_I

60

80

100

µA

Current Limit Time-Out Threshold (CTIM)

CTIM Charging Current

CTIM Discharge Current

CTIM Pull-Up Current

RILIM Pin Current Source Output

Charge Pump Output Current

Charge Pump Output Voltage

CTIM_Vth

CTIM_I

CTIM_disI

CTIM_disI

RILIM_Io

Qpmp_Io

Qpmp_Vo

VCTIM = 8V

CPUMP = 0.1µF, CPUMP = 16V

No load

1.8

2

2.2

V

8

10

12

µA

1.7

2.6

3.5

mA

3.5

5

6.5

mA

90

100

110

µA

320

560

800

µA

17.2

17.4

-

V

Charge Pump Output Voltage - Loaded

Qpmp_VIo Load current = 100µA

16.2

16.7

-

V

Charge Pump POR Rising Threshold

Qpmp+Vth

15.6

16

16.5

V

Charge Pump POR Falling Threshold

Qpmp-Vth

15.2

15.7

16.2

V

HIP1012 Description and Operation

The HIP1012 is a multi featured dual power supply

distribution controller, including programmable current

limiting regulation and time to latch off. Additionally the

HIP1012 operates both as a +3.3V and 5V or a +5V and

+12V power supply controller with each mode having

appropriate Under Voltage (UV) fault notification levels.

Upon initial power up HIP1012 can either isolate the

voltage supply from the load by holding the external

N-Channel MOSFET switches off or apply the supply rail

voltage directly to the load for true hot swap capability. In

either case the HIP1012 turns on in a soft start mode

protecting the supply rail from sudden current loading. If

either PWRON pin is pulled low the HIP1012 will be in true

hot swap mode. Both PWRON pins must be high to turn off

the HIP1012 thus isolating the power supply from the load

through the external FETs.

At turn-on, the gate capacitor of each external N-Channel

MOSFET is charged with a 10µA current source. These

capacitors create a programmable ramp (soft turn-on). A

charge pump supplies the gate drive for the 12V supply

switch driving that gate to 17V.

The load currents pass through two external current sense

resistors. When the voltage across either resistor exceeds

the user programmed Over Current (OC) voltage threshold

value, (see Table 1) the controller enters current regulation.

At this time the time-out capacitor, CTIM, starts charging with

a 10µA current source and the controller enters the time out

period. The length of the time out period is set by the single

external capacitor (see Table 2) placed from the CTIM pin

(pin 10) to ground and is characterized by a lowered gate

drive voltage to the appropriate external N-Channel

MOSFET. Once CTIM charges to 2V, an internal comparator

is tripped resulting in both N-Channel MOSFETs being

latched off.

5

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