CS2841B datasheet(4/10 Pages) ONSEMI

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CS2841B

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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

Unit

Max

Typ

Min

Test Conditions

Output Section

Output Low Level

ISINK = 20 mA

ISINK = 200 mA

−

0.1

1.5

0.4

2.2

Output High Level

ISOURCE = 20 mA

ISOURCE = 200 mA

13.5

−

Rise Time

TJ = 25°C, CL = 1.0 nF. Note 7

−

150

Fall Time

TJ = 25°C, CL = 1.0 nF. Note 7

−

150

Output Leakage

Undervoltage Active, VOUT = 0

−

−0.01

−10

Total Standby Current

Startup Current

−

0.5

1.0

Operating Supply Current ICC

VFB = VSense = 0 V, RT = 10 kW, CT = 3.3 nF

−

Undervoltage Lockout Section

Start Threshold

−

7.6

8.0

8.4

Min. Operating Voltage

After Turn On

7.0

7.4

7.8

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

PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL

FUNCTION

PDIP−8

SOIC−14

COMP

Error Amp Output, Used to Compensate Error Amplifier

VFB

Error Amp Inverting Input

Sense

Noninverting Input to Current Sense Comparator

OSC

Oscillator Timing Network with Capacitor to Ground, Resistor to VREF

GND

Ground

Pwr GND

Output Driver Ground

VOUT

Output Drive Pin

VCC Pwr

Output Driver Positive Supply

VCC

Positive Power Supply

VREF

Output of 5.0 V Internal Reference

2, 4, 6, 13

No Connection

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