UC2844G-S08-T datasheet(5/7 Pages) UTC

部品番号	UC2844G-S08-T

部品情報	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

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メーカー	UTC [Unisonic Technologies]

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UC2844/45

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

5 of 7

www.unisonic.com.tw

QW-R103-051.B

ELECTRICAL CHARACTERISTICS(Cont.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CURRENT SENSE SECTION

Current Sense Input Voltage Gain

GV

(Note 2, 3)

2.85

3.0

3.15

V/V

Maximum Current Sense Input

Threshold

VI(THR)

(Note 2)

0.9

1.0

1.1

V

Input Bias Current

II(BIAS)

-2.0

-10

μA

Power Supply Rejection Ratio

PSRR

VCC=12V ~ 25V (Note4)

70

dB

Propagation Delay

tPLH(IN/OUT)

150

300

ns

OUTPUT SECTION

Output Voltage

Low

VOL

ISINK=20mA

0.1

0.4

V

ISINK=200mA

1.6

2.2

High

VOH

ISINK=20mA

13

13.5

V

ISINK=200mA

12

13.4

Output Voltage with UVLO Activated

VOL(UVLO)VCC=6.0V, ISINK=1.0mA

0.1

1.1

V

Output Voltage Rise Time

tR

CL=1.0nF,TJ=25°С

50

150

ns

Output Voltage Fall Time

tF

CL=1.0nF,TJ=25°С

50

150

ns

UNDERVOLTAGE LOCKOUT SECTION

Startup Threshold

UC2844

VTHR

15

16.0

17

V

UC2845

7.8

8.4

9.0

Minimum Operating

Voltage After Turn-On

UC2844

VCC(MIN)

9.0

10.0

11.0

V

UC2845

7.0

7.6

8.2

PWM SECTION

Duty Cycle

MAX

DCMAX

47

48

50

%

MIN

DCMIN

0

%

TOTAL DEVICE

Power Supply Zener Voltage

VZ

ICC=25mA

30

36

-

V

Power Supply Current

(Note 4)

UC2845

ICC

VCC=6.5V

0.5

1.0

mA

UC2844

VCC=14V

12

17

Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

as possible.

2. This parameter is measured at the latch trip point with VFB=0V.

3. Comparator gain is defined as:

ΔV Output Compensation

AV=

ΔV Current Sense Input

4. Adjust VCC above the startup threshold before setting to 15V.

同様の部品番号 - UC2844G-S08-T

メーカー	部品番号	データシート	部品情報
Unisonic Technologies	UC2844G-S08-T	294Kb / 7P	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

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同様の説明 - UC2844G-S08-T

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