PRM48BH480T200B00

PRM® Regulator

Page 3 of 22

Rev 1.1

7/2015

vicorpower.com

800 927. 9474

 

 

 

 

3.0 SIGNAL CHARACTERISTICS

 

Primary Control

PC

• The PC pin enables and disables the PRM

• In PRM array configurations, PC pins should be connected in order to synchronize startup.

• It is a weak pull-down during any fault mode excluding short circuit. PC is a strong pull-down to SG if a Short Circuit fault is latched.

Signal Type

State

Attribute

Symbol

Conditions / Notes

Min

Typ

Max

Unit

 

Analog Output

Regular

Operation

PC Voltage

4.7

5.3

V

PC Available Current

1.8

mA

Startup

PC Source Current

90

µA

Minimum Time to Start

Section 5.0

10.0

18.0

30.0

ms

 

Digital Input / Output

Startup

PC Enable Threshold

2.50

3.20

V

Standby

PC Disable Threshold

1.75

2.40

V

PC Resistance to disable

Max Resistance to SG required to disable the PRM

300

Ω

Digital Output [Short Circuit Fault]

Fault

PC Sink Current to SG

Short circuit, PC Voltage 1 V or above

25

mA

Digital Output [All other Faults]

Fault

PC Sink Current to ~1V

10

µΑ

 

Voltage Source

VS

• Intended to power feedback components and/or auxiliary circuits.

Signal Type

State

Attribute

Symbol

Conditions / Notes

Min

Typ

Max

Unit

 

 

Analog Output

 

Regular

Operation

VS Voltage

8.55

9.00

9.45

V

VS Available Current

5

mA

VS Voltage Ripple

Iout = 0A, Cvs_ext=0. Maximum specification

includes powertrain operation in burst mode.

 

100

400

mV

Transition

VS Capacitance (External)

0.04

µF

VS Fault Response Time

From fault recognition to VS = 1.5 V

30

µs

 

Reference Enable

RE

• RE signals successful startup and powertrain ready to operate

• Regulated, delayed voltage source intended to power the feedback circuit voltage reference and current monitor

Signal Type

State

Attribute

Symbol

Conditions / Notes

Min

Typ

Max

Unit

 

 

 

Analog Output

 

Regular

Operation

RE Voltage

3.0

3.3

3.6

V

RE Available Current

8.0

mA

RE Regulation

across load and temperature

±2.5

%

RE Voltage Ripple

includes powertrain in burst mode

100

mV

 

Transition

PC to RE Delay

Fault detected

100

µs

RE Capacitance (External)

0.1

µF

VS to RE Delay

1

ms

 

Control Node

PR

• Modulator control node input

• Sinks constant current when externally driven

• Sources current when pulled below active range

Signal Type

State

Attribute

Symbol

Conditions / Notes

Min

Typ

Max

Unit

 

Analog Input

 

Regular

Operation

PR Voltage Active Range

0.79

7.40

V

PR Source Current

2

mA

PR Sink Current

250

500

750

µA

PR Resistance to SG (Internal)

93.3

kΩ

 

Current Feedback

IF

• A voltage proportional to the PRM output current must be supplied externally to the IF pin in order for the device to properly protect overcurrent events and to enable output current limit (clamp)

Signal Type

State

Attribute

Symbol

Conditions / Notes

Min

Typ

Max

Unit

 

 

Analog Input

 

Regular

Operation

Current Limit (clamp) Threshold

1.90

2.00

2.10

V

Overcurrent Protection Threshold

Not Production Tested; Guaranteed by Design;

2.58

2.69

2.80

IF Input Impedance

2.11

2.13

2.15

kΩ

Current Limit Bandwidth

2

kHz