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LT1509CSW Arkusz danych(PDF) 4 Page - Linear Technology

Numer części LT1509CSW
Szczegółowy opis  Power Factor and PWM Controller
PDF  16 Pages
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
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LT1509CSW Arkusz danych(HTML) 4 Page - Linear Technology

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LT1509
ELECTRICAL C
C
HARA TERISTICS
VCC = 18V, RSET = 15k to GND, CSET = 1nF to GND, IAC = 100µA, ISENSE = 0V, CAOUT = 3.5V, VAOUT = 5V, OVP = VREF. No load on any
outputs, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Soft Start Current
SS1 Current (PFC)
SS1 = 2.5V
q
512
30
µA
SS2 Current (PWM)
SS2 = 1V
q
512
30
µA
Comparators in PWM Section
RAMP Input Current
RAMP = 0V, VC = 1.6V
q
– 0.3
– 2
µA
Current Limit Comparator (CL) Threshold
VC > 2.6V
q
0.95
1.1
1.2
V
GTDR2 Switching Off Threshold at VC or at SS2
RAMP = 0V
q
1V
VC Input Current
VC = 0V
q
–20
– 80
µA
PWMOK Comparator Low Threshold (in Terms of VREF)
q
0.57
0.63
0.70
VC Pin High Voltage (LT1509)
1mA into VC Pin
q
2.6
3.2
3.8
V
GTDR2 Turn-On Blanking Time
180
ns
IM
IAC (VAOUT – 2)
2
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Multiplier Gain Constant: K =
Note 2: GTDR2 (PWM) pulse is delayed by 53% duty cycle after GTDR1
(PFC) is set. See PFC/PWM Synchronization graph in the Typical
Performance Characteristics section.
TYPICAL PERFORMANCE CHARACTERISTICS
PFC Voltage Amplifier Open-Loop
Gain and Phase
FREQUENCY (Hz)
10
100
80
60
40
20
0
–20
100
1k
10k
100k
LT1509 • TPC01
1M
10M
0
–20
–40
–60
–80
–100
–120
PHASE
GAIN
FREQUENCY (Hz)
10
100
80
60
40
20
0
–20
100
1k
10k
100k
LT1509 • TPC02
1M
10M
0
–20
–40
–60
–80
–100
–120
PHASE
GAIN
PFC Current Amplifier Open-Loop
Gain and Phase
TIME
LT1509 TPC03
PFC (GTDR1)
53%
PWM (GTDR2)
PFC/PWM Synchronization



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