SG1846 查看數據表（PDF） - Microsemi Corporation

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SG1846

CURRENT MODE PWM CONTROLLER

Microsemi Corporation 

SG1846

ELECTRICAL CHARACTERISTICS (continued)

Parameter

Under-Voltage Lockout Section

Start-Up Threshold

Threshold Hysteresis

Total Standby Current

Supply Current

Test Conditions

SG1846

SG2846

SG3846

Units

Min. Typ. Max. Min. Typ. Max.

7.7 8.0

0.75

7.7 8.0 V

0.75

V

17 21

17 21 mA

Note 4. These parameters although guaranteed over the recommended

operating conditions, are not tested in production.

Note 5. Parameter measured at trip point of latch with VPIN 5 = VREF ,

VPIN 6 = 0V.

Note 6. Amplifier gain defined as :

G=

∆ VPIN 7

∆ VPIN 4

; V = 0V to 1.0V

PIN 4

Note 7. Current into Pin 1 guaranteed to latch circuit in shutdown state.

Note 8. Current into Pin 1 guaranteed not to latch circuit in shutdown

state.

Note 9. RT = 10KΩ, CT = 4.7nF

CHARACTERISTIC CURVES

FIGURE 1.

REFERENCE VOLTAGE VS. TEMPERATURE

FIGURE 2.

VREF SHORT CIRCUIT CURRENT VS. TEMPERATURE

FIGURE 3.

CURRENT SENSE THRESHOLD

VS. ERROR AMPLIFIER OUTPUT

FIGURE 4.

CURRENT SENSE GAIN VS. TEMPERATURE

FIGURE 5.

OSCILLATOR VALLEY VOLTAGE VS. TEMPERATURE

FIGURE 6.

OSCILLATOR PEAK VOLTAGE VS. TEMPERATURE

4/90 Rev 1.1 2/94

Copyright © 1994

LINFINITY Microelectronics Inc.

4

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

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