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| 型号： | LT1508ISW#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | POWER FACTOR CONTROLLER WITH POST REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | 0.300 INCH, PLASTIC, SO-20 |
| 文件页数： | 11/16页 |
| 文件大小： | 300K |
| 代理商： | LT1508ISW#TR |
4
LT1508
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
U
W
PFC Voltage Amplifier Open-Loop
Gain and Phase
FREQUENCY (Hz)
10
GAIN
(dB)
100
80
60
40
20
0
–20
100
1k
10k
100k
1508 G01
1M
10M
0
–20
–40
–60
–80
–100
–120
PHASE
(DEG)
PHASE
GAIN
FREQUENCY (Hz)
10
GAIN
(dB)
100
80
60
40
20
0
–20
100
1k
10k
100k
1508 G02
1M
10M
0
–20
–40
–60
–80
–100
–120
PHASE
(DEG)
PHASE
GAIN
PFC Current Amplifier Open-Loop
Gain and Phase
TIME
1508 G03
PFC (GTDR1)
53%
PWM (GTDR2)
PFC/PWM Synchronization
ELECTRICAL C
C
HARA TERISTICS
VCC = 18V, RSET = 15k to GND, CSET = 1nF to GND, IAC = 100A, 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
A
SS2 Current (PWM)
SS2 = 1V
q
512
30
A
Comparators in PWM Section
ILIM Input Current
ILIM = 0V, VC = 1.6V
q
–0.3
–2
A
Current Limit Comparator (CL) Threshold
VC > 2.6V
q
0.95
1.1
1.20
V
GTDR2 Switching Off Threshold at VC or at SS2
ILIM = 0V
q
1V
VC Input Current
VC = 0V
q
–20
– 80
A
PWMOK Comparator Low Threshold (in Terms of VREF)
q
0.57
0.63
0.70
VC Pin High Voltage
1mA into VC Pin
q
6.2
6.9
7.5
V
GTDR2 Turn-On Blanking Time
180
ns
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相关代理商/技术参数 |
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|---|---|
| LT1509 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Factor and PWM Controller |
| LT15090 | 制造商:Cooper Crouse-Hinds 功能描述: 制造商:CROUSE-HINDS/COOPER 功能描述: |
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| LT1509CN#PBF | 功能描述:IC PFC CTRLR AVERAGE CURR 20DIP RoHS:是 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
| LT1509CSW | 功能描述:IC PFC CTRLR AVERAGE CURR 20SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - PFC（功率因数修正） 系列:- 产品培训模块:GreenChip Synchronous Rectification Control Family of ICs 标准包装:1 系列:- 模式:间歇导电（DCM） 频率 - 开关:- 电流 - 启动:- 电源电压:8.6 V ~ 38 V 工作温度:-20°C ~ 150°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SO 包装:Digi-Reel® 其它名称:568-5348-6 |
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