IRS2548D

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© 2011 International Rectifier

7

Electrical Characteristics (cont’d)

VCC = VBS = VBIAS=14V +/- 0.25V, CLO = CHO = CPFC = 1000pF, RFMIN = 42.2kOhm,

VENN = VCOMP = VCS = VOC = VBUS = VZX = 0V, TA=25C unless otherwise specified.

Symbol

Definition

Min

Typ

Max

Units Test Conditions

Floating Supply Characteristics

IBS

VBS Supply Current

---

0.9

1.3

mA

MODE=RUN

VBSUV+

VBS Supply Undervoltage Positive Going

Threshold

8.0

9.0

10.0

VBS rising from

0V

VBSUV-

VBS Supply Undervoltage Negative

Going Threshold

7.0

8.0

9.0

V

VBS falling from

14V

ILKVS

VS Offset Supply Leakage Current

---

---

50

uA

VB = VS = 600V

PFC Error Amplifier Characteristics

ICOMP

SOURCE

COMP Pin OTA Error Amplifier Output

Current Sourcing

---

30

---

uA

MODE = RUN

VVBUS = 3.5V

VCOMP=4.0V

ICOMP

SINK

COMP Pin OTA Error Amplifier Output

Current Sinking

---

-30

---

MODE = RUN

VVBUS = 4.5V

VCOMP=4.0V

VCOMPOH

OTA Error Amplifier Output Voltage

Swing (high state)

---

12.5

---

V

VBUS=3.5V

ICOMP=ICOMP_

SOURCE - 5uA

VCOMPOL

OTA Error Amplifier Output Voltage

Swing (low state)

---

0.4

---

VBUS=5.0V

ICOMP=ICOMP_

SINK + 5uA

VCOMPFLT

OTA Error Amplifier Output Voltage in

Fault Mode

---

0

---

VBUS=4.0V

PFC Control Characteristics

VVBUS

REG

VBUS Internal Reference Voltage

3.93

4.03

4.13

VVBUSOV

VBUS Over-voltage Comparator

Threshold

4.1

4.3

4.5

V

VVBUSOV

HYS

VBUS Over-voltage Comparator

Hysteresis

50

150

300

mV

VCOMP = 4.0V

VZX

ZX Pin Threshold Voltage

1.8

2.0

2.2

V

VZXhys

ZX pin Comparator Hysteresis

---

300

---

mV

VZXclamp

ZX pin Clamp Voltage (high state)

---

6.7

---

V

IZX = 1mA

tBLANK

OC pin current-sensing blank time

---

300

---

ns

VBUS=4.0V

VCOMP=4.0V

tWD

PFC Watch-dog Pulse Interval

---

400

---

us

ZX = 0, VCOMP

= 4.0V

PFC Protection Circuitry Characteristics

VOCTH+

OC Pin Over-current Sense Threshold

1.1

1.2

1.3

VBUS=VCOMP

=4.0V