參數(shù)資料
型號： UC3877L
廠商： Texas Instruments, Inc.
英文描述： Phase Shift Resonant Controller
中文描述： 相移諧振控制器
文件頁數(shù)： 5/19頁
文件大?。?/td> 721K
代理商： UC3877L
5
UC1875/6/7/8
UC2875/6/7/8
UC3875/6/7/8
Note 1: Phase shift percentage (0% = 0°, 100% = 180°) is defined as
θ =
200
T
Φ
%
, where
is the phase shift, and
and T are de-
fined in Figure 1. At 0% phase shift,
is the output skew.
Note 2: Delay time is defined as delay = T (1/2–(duty cycle)), where T is defined in Fig. 1.
Note 3: Ramp offset voltage has a temperature coefficient of about –4mV/°C.
Note 4: Zero phase shift voltage has a temperature coefficient of about –2mV/°C.
Note 5: Delay time can be programmed via resistors from the delay set pins to ground. Delay time
62 5 10
12
.
–
I
DELAY
sec. Where
I
DELAY
=
Delay set voltage
R
DELAY
The recommended range for I
DELAY
is 25 A
I
DELAY
1mA
Note 6: Ramp delay to output time is defined in Fig. 2.
Note 7: Not production tested at -55
°
C.
Duty Cycle = t/T
T
DHL
(A to C) = T
DHL
(B to D) =
Φ
Phase Shift, Output Skew & Delay Time Definitions
Period = T
UDG-95074
Figure 1
Figure 2
UDG-95075
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, –55°C < T
A
< 125°C for the UC1875/6/7/8, –25°C < T
A
<
85°C for the UC2875/6/7/8 and 0°C < T
A
< 70°C for the UC3875/6/7/8, VC = VIN = 12V, R
FREQSET
= 12k
, C
FREQSET
= 330pF,
R
SLOPE
= 12k
, C
RAMP
= 200pF, C
DELAYSET A-B
= C
DELAYSET C-D
= 0.01
μ
F, I
DELAYSET A-B
= I
DELAYSET C-D
= –500
μ
A, T
A
= T
J
.
PARAMETER
TEST CONDITIONS
Soft-Start/Reset Delay
Charge Current
V
SOFTSTART
= 0.5V
Discharge Current
V
SOFTSTART
= 1V
Restart Threshold
Discharge Level
Output Drivers
Output Low Level
I
OUT
= 50mA
I
OUT
= 500mA
Output High Level
I
OUT
= –50mA
I
OUT
= –500mA
Delay Set (UC1875 and UC1876 only)
Delay Set Voltage
I
DELAY
= –500
μ
A
Delay Time, (Note 8)
I
DELAY
= –250
μ
A (Note 5) (UC3875/6/7/8,
UC2875/6/7/8)
I
DELAY
= –250
μ
A (Note 5) (UC1875/6/7/8)
MIN
TYP
MAX
UNITS
–20
120
4.3
–9
230
4.7
300
–3
μ
A
μ
A
V
mV
0.2
1.2
1.5
1.7
0.4
2.6
2.5
2.6
V
V
V
V
2.3
150
2.4
250
2.6
400
V
nsec
150
250
600
nsec
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相關代理商/技術參數(shù)
參數(shù)描述
UC3877N 制造商:Rochester Electronics LLC 功能描述:PHASE SHIFT RESONANT CONT - Bulk
UC3879DW 功能描述:軟開關 PWM 控制器 Phase Shift Resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
UC3879DWG4 功能描述:軟開關 PWM 控制器 Phase Shift Resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
UC3879DWTR 功能描述:軟開關 PWM 控制器 Phase Shift Resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
UC3879DWTRG4 功能描述:軟開關 PWM 控制器 Phase Shift Resonant Controller RoHS:否 制造商:Fairchild Semiconductor 輸出端數(shù)量: 輸出電流: 開關頻率: 工作電源電壓:30 V 電源電流: 最大工作溫度:+ 105 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
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