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SG1846 Datasheet(PDF) 4 Page - Microsemi Corporation

Part No. SG1846
Description  CURRENT MODE PWM CONTROLLER
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Maker  MICROSEMI [Microsemi Corporation]
Homepage  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

SG1846 Datasheet(HTML) 4 Page - Microsemi Corporation

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SG1846
4/90 Rev 1.1 2/94
LINFINITY Microelectronics Inc.
Copyright
© 1994
11861 Western Avenue
∞ Garden Grove, CA 92841
4
(714) 898-8121
∞ FAX: (714) 893-2570
ELECTRICAL CHARACTERISTICS (continued)
Max. Min. Typ. Max.
Typ.
SG3846
Parameter
Test Conditions
Units
SG1846
SG2846
7.7
0.75
8.0
7.7
0.75
8.0
V
V
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 V
PIN 5 = VREF ,
V
PIN 6 = 0V.
Note 6. Amplifier gain defined as : G =
; V
PIN 4
= 0V to 1.0V
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. R
T = 10K Ω, CT = 4.7nF
Min.
CHARACTERISTIC CURVES
FIGURE 1.
REFERENCE VOLTAGE VS. TEMPERATURE
FIGURE 2.
V
REF 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
Under-Voltage Lockout Section
Start-Up Threshold
Threshold Hysteresis
Total Standby Current
Supply Current
17
21
17
21
mA
∆ V
PIN 7
∆ V
PIN 4


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