SG2524, SG3524

REGULATING PULSEWIDTH MODULATORS

SLVS077D – APRIL 1977 – REVISED FEBRUARY 2003

4

POST OFFICE BOX 655303

error amplifier section

PARAMETER

TEST

SG2524

SG3524

UNIT

PARAMETER

TEST

CONDITIONS†

MIN

TYP‡

MAX

MIN

TYP‡

MAX

UNIT

VIO

Input offset voltage

VIC = 2.5 V

0.5

5

2

10

mV

IIB

Input bias current

VIC = 2.5 V

2

10

2

10

µA

Open-loop voltage amplification

72

80

60

80

dB

VICR

Common-mode input voltage range

TA = 25°C

1.8 to

3.4

1.8 to

3.4

V

CMMR

Common-mode rejection ratio

70

70

dB

B1

Unity-gain bandwidth

3

3

MHz

Output swing

TA = 25°C

0.5

3.8

0.5

3.8

V

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

‡ All typical values, except for temperature coefficients, are at TA = 25°C

output section

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

V(BR)CE

Collector-emitter breakdown voltage

40

V

Collector off-state current

VCE = 40 V

0.01

50

µA

Vsat

Collector-emitter saturation voltage

IC = 50 mA

1

2

V

VO

Emitter output voltage

VC = 20 V,

IE = –250 µA

17

18

V

tr

Turn-off voltage rise time

RC = 2 kΩ

0.2

µs

tf

Turn-on voltage fall time

RC = 2 kΩ

0.1

µs

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

‡ All typical values, except for temperature coefficients, are at TA = 25°C.

comparator section

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

Maximum duty cycle, each output

45%

V

Inp t threshold oltage at COMP

Zero duty cycle

1

V

VIT

Input threshold voltage at COMP

Maximum duty cycle

3.5

V

IIB

Input bias current

–1

µA

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

‡ All typical values, except for temperature coefficients, are at TA = 25°C.

current limiting section

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

VI

Input voltage range (either input)

–1 to1

V

V(SENSE)

Sense voltage at TA = 25°C

V(IN ) V(IN ) ≥ 50 mV V(COMP) 2V

175

200

225

mV

Temperature coefficient of sense voltage

V(IN+) – V(IN–) ≥ 50 mV, V(COMP) = 2 V

0.2

mV/

°C

‡ All typical values, except for temperature coefficients, are at TA = 25°C.

total device

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

Ist

Standby current

VCC = 40 V, IN–, CURR LIM+, CT, GND, COMP, EMIT 1, EMIT 2 grounded,

IN+ at 2 V, All other inputs and outputs open

8

10

mA

‡ All typical values, except for temperature coefficients, are at TA = 25°C.