C1888CT datasheet(3/6 Pages) TI

3 / 6 page

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

General

VCC Zener Voltage

ICC < 1.5mA

8.6

9.0

9.3

Startup Current

VOUT = 0

150

250

µA

Operating Current I(VCC)VCC = VCC(zener) – 100mV, F = 150kHz

1.2

2.5

Under-Voltage-Lockout

Start Threshold

VOUT = 0

8.0

8.4

8.8

Minimum Operating Voltage after Start

VOUT = 0

6.0

6.3

6.6

Hysteresis

VOUT = 0

1.8

Oscillator

Amplitude

VCC = 9V

3.5

3.7

3.9

CT to DRIVE high Propagation Delay

Overdrive = 0.2V

100

200

CT to DRIVE low Propagation Delay

Overdrive = 0.2V

100

Driver

VOL

I = 20mA, VCC = 9V

0.15

0.4

I = 100mA, VCC = 9V

0.7

1.8

VOH

I =

−20mA, VCC = 9V

8.5

8.8

I =

−100mA, VCC = 9V

6.1

7.8

Rise Time

CLOAD = 1nF

Fall Time

CLOAD = 1nF

Line Voltage Detection

Charge Coefficient: ICHG / I(TON)

VCT = 3V, DRIVE = High, I(TON) = 1mA

0.73

0.79

0.85

Minimum Line Voltage for Fault

RON = 330k

100

Minimum Current I(TON) for Fault

RON = 330k

220

µA

On Time During Fault

CT = 150pF, VLINE = Min

− 1V

µs

Oscillator Restart Delay after Fault

0.5

VOUT Error Amp

VOUT Regulated 5V (ADJ Open)

VCC = 9V, IDCHG = I(TOFF)/2

4.5

5.0

5.5

Discharge Ratio: IDCHG / I(TOFF)I(TOFF) = 50

µA

0.95

1.01

1.07

Voltage at TOFF

I(TOFF) = 50

µA

0.6

0.95

1.3

Regulation gm (Note 1)

Max IDCHG = 50

µA2.4

mA/V

Max IDCHG = 125

µA

1.9

4.1

7.0

mA/V

Unless otherwise stated, these specifications hold for TA = 0

°C to 70°C for the

UCC3888, -40

°C to +85°C for the UCC2888, and -55°C to +125°C for the UCC1888.

No load at DRIVE pin (CLOAD=0).

ELECTRICAL CHARACTERISTICS

DIL-8, SOIC-8 (Top View)

N or J, D Package

CONNECTION DIAGRAM

ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA

Current into TON Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5mA

Voltage on VOUT Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V

Current into TOFF Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

µA

Storage Temperature . . . . . . . . . . . . . . . . . . . . -65

°C to +150°C

Note: Unless otherwise indicated, voltages are referenced to

ground and currents are positive into, negative out of, the speci-

fied terminals.

ABSOLUTE MAXIMUM RATINGS

UCC1888

UCC2888

UCC3888

Note 1: gm is defined as

∆IDCHG

∆VOUT

for the values of VOUT when VOUT is in regulation. The two points used to calculate gm are for

IDCHG at 65% and 35% of its maximum value.

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