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UC2825A-EP Scheda tecnica(PDF) 10 Page - Texas Instruments

Il numero della parte UC2825A-EP
Spiegazioni elettronici  HIGH-SPEED PWM CONTROLLER
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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UC2825A-EP Scheda tecnica(HTML) 10 Page - Texas Instruments

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UDG−95108
VCC = OPEN
255C
–555C
Current – A
0
0.2
0.4
0.6
0.8
1.0
0
1
2
3
UDG−95106
250 mA
50 k
Q4
Q1
Q2
Q3
UVLO
OUT
PGND
VCC
UDG−95109
UDG−95110
ISWITCH
Current Mode
Voltage Mode
Oscillator
Oscillator
CT
CT
1.25 V
Ramp
RSENSE
From E/A
CT
1.25 V
Ramp
From E/A
CT
UC2825A-EP
SGLS305D – JULY 2005 – REVISED SEPTEMBER 2010
www.ti.com
Active-Low Outputs During UVLO
The UVLO function forces the outputs to be low and considers both VCC and VREF before allowing the chip to
operate.
Figure 6. Output Voltage vs Output Current
Figure 7. Output V and I During UVLO
Control Methods
Figure 8. Control Methods
10
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