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參數(shù)資料
| 型號： | L6668 |
| 廠商： | 意法半導體 |
| 英文描述： | SMART PRIMARY CONTROLLER |
| 中文描述： | 智能主控制器 |
| 文件頁數(shù)： | 2/23頁 |
| 文件大小： | 671K |
| 代理商： | L6668 |
L6668
2/23
2
L6668 is a current-mode primary controller IC, designed to build single-ended converters.
The IC drives the system at fixed frequency at heavy load and an improved Standby function causes a
smooth frequency reduction as the load is progressively reduced. At very light load the device enters a
special operating mode (burst-mode with fixed, externally programmed peak current) that, in addition to
the on-board high-voltage start-up and the very low quiescent current, helps keep low the consumption
from the mains and be compliant with energy saving regulations. To allow meeting compliance with these
standards in power-factor-corrected systems too, an interface with the PFC controller is provided that en-
ables to turn off the pre-regulator when the load level falls below a threshold.
The IC includes also a programmable soft-start, slope compensation for stable operation at duty cycles
greater then 50%, a disable function, a leading edge blanking on current sense to improve noise immunity,
latched disable for OVP or OTP shutdown and an effective two-level OCP able to protect the system even
in case the secondary diode fails short.
Description
Table 2. Absolute Maximum Ratings
Table 3. Thermal Data
Figure 3. Pin Connection
(Top view)
Symbol
Pin
Parameter
Value
Unit
V
cc
5
IC Supply voltage (Icc = 20 mA)
Self-limited
V
V
HV
1
High-voltage start-up generator voltage range
-0.3 to 700
V
I
HV
1
High-voltage start-up generator current
Self-limited
A
---
Analog Inputs & Outputs, except pin 14
-0.3 to 8
V
I
PFC_STOP
14
Max. sink current (low state)
2
mA
V
PFC_STOP
14
Max. voltage (open state)
16
V
P
tot
Power Dissipation @Tamb = 50°C
0.75
W
T
j
Junction Temperature Operating range
-25 to 150
°C
T
stg
Storage Temperature
-55 to 150
°C
Symbol
Parameter
Value
Unit
R
th j-amb
Thermal Resistance Junction to AmbientMax
120
°C/W
VREF
SKIPADJ
HV
HVS
OUT
N.C.
DIS
RCT
PFC_STOP
ISEN
COMP
GND
Vcc
S-COMP
STBY
SS
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6668_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SMART PRIMARY CONTROLLER |
| L6668B2 | 功能描述:電流型 PWM 控制器 POWER SUPPLY RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L6668TR | 功能描述:電流型 PWM 控制器 SMART CONTROLLER RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L667 | 制造商:BURNDY 功能描述:L-DIE |
| L-667 | 制造商:RHOMBUS-IND 制造商全稱:Rhombus Industries Inc. 功能描述:Common Mode Inductor For DC/DC Power supply |
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