CS2841B(2008) Ver la hoja de datos (PDF) - ON Semiconductor

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componentes Descripción

Fabricante

CS2841B
(Rev.:2008)

Automotive Current Mode PWM Control Circuit

ON Semiconductor 

CS2841B

ELECTRICAL CHARACTERISTICS (-40°C ≤ TA ≤ 85°C, RT = 680 kW, CT = 0.022 mF for Triangular Mode, VCC = 15 V (Note 3),

RT = 10 kW, CT = 3.3 nF for Sawtooth Mode (see Figure 7); unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Reference Section

Output Voltage

Line Regulation

Load Regulation

Temperature Stability

TJ = 25°C, IOUT = 1.0 mA

8.4 ≤ VCC ≤ 16 V

1.0 ≤ IOUT ≤ 20 mA

Note 4

4.9

5.0

5.1

V

-

6.0

20

mV

-

6.0

25

mV

-

0.2

0.4

mV/°C

Total Output Variation

Line, Load, Temp. Note 4

4.82

-

5.18

V

Output Noise Voltage

Long Term Stability

Output Short Circuit

Oscillator Section

10 Hz ≤ f ≤ 10 kHz, TJ = 25°C. Note 4

TA = 125°C, 1000 Hrs. Note 4

TA = 25°C

-

50

-

mV

-

5.0

25

mV

-30

-100

-180

mA

Initial Accuracy

Voltage Stability

Temperature Stability

Amplitude

Discharge Current

Error Amp Section

Sawtooth Mode: TJ = 25°C. See Figure 7.

47

52

57

kHz

Sawtooth Mode: -40°C ≤ TA ≤ +85°C

44

52

60

kHz

Triangular Mode: TJ =25°C. See Figure 7.

44

52

60

kHz

8.4 ≤ VCC ≤ 16 V

-

0.2

1.0

%

Sawtooth Mode: TMIN ≤ TA ≤ TMAX. Note 4

-

5.0

-

%

Triangular Mode: TMIN ≤ TA ≤ TMAX. Note 4

-

8.0

-

%

VOSC (Peak to Peak)

-

1.7

-

V

TJ = 25°C

TMIN ≤ TA ≤ TMAX

7.4

8.3

9.2

mA

7.2

-

9.4

mA

Input Voltage

Input Bias Current

AVOL

Unity Gain Bandwidth

VCOMP = 2.5 V

VFB = 0 V

2.0 ≤ VOUT ≤ 4.0 V

Note 4

2.42

2.5

2.58

V

-

-0.3

-2.0

mA

65

90

-

dB

0.7

1.0

-

MHz

PSRR

Output Sink Current

Output Source Current

VOUT High

VOUT Low

Current Sense Section

8.4 V ≤ VCC ≤ 16 V

VFB = 2.7 V, VCOMP = 1.1 V

VFB = 2.3 V, VCOMP = 5.0 V

VFB = 2.3 V, RL = 15 kW to Ground

VFB = 2.7 V, RL = 15 kW to VREF

60

70

-

dB

2.0

6.0

-

mA

-0.5

-0.8

-

mA

5.0

6.0

-

V

-

0.7

1.1

V

Gain

Notes 5 and 6

2.85

3.0

3.15

V/V

Maximum Input Signal

VCOMP = 5.0 V. Note 5

PSRR

12 V ≤ VCC ≤ 25 V. Note 5

Input Bias Current

VSense = 0 V

Delay to Output

TJ = 25°C. Note 4

3. Adjust VCC above the start threshold before setting at 15 V

4. These parameters, although guaranteed, are not 100% tested in production

5. Parameter measured at trip point of latch with VFB = 0

6. Gain defined as:

0.9

1.0

1.1

V

-

70

-

dB

-

-2.0

-10

mA

-

150

300

ns

A

+

DVCOMP

DVSense

;Ă

0

v

VSense

v

0.8ĂV.

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