- 您現在的位置：買賣IC網 > Datasheet目錄44 > MC33260DR2G (ON Semiconductor)IC PFC CONTROLLER DCM 8SOIC Datasheet資料下載
參數資料
| 型號： | MC33260DR2G |
| 廠商： | ON Semiconductor |
| 文件頁數： | 12/22頁 |
| 文件大小： | 372K |
| 描述： | IC PFC CONTROLLER DCM 8SOIC |
| 產品變化通告： | Reactivation Notice 08/Apr/2011 Product Discontinuation 27/Jan/2012 |
| 標準包裝： | 1 |
| 系列： | GreenLine™ |
| 模式： | 間歇導電（DCM） |
| 電流 - 啟動： | 100µA |
| 電源電壓： | 11 V ~ 16 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOICN |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | MC33260DR2GOSCT |
MC33260
http://onsemi.com
12
Pin Numbers are Relevant to the PDIP- -8 Version
Figure 29. PWM Latch
PWM
Latch
R
S
Q
Q
Synchronization
Arrangement
--
+
OVP, UVP
&
--
+
PWM Latch
Comparator
V
control
(V
pin2
-- Regulation Output)
Output
Buffer
7
ZCD & OCP
Current Sense
Comparator
--60 mV
Oscillator Sawtooth
Output_Ctrl
Th--Stdwn
V
CC
5
ALEB (Leading Edge Blanking) has been implemented.
This circuitry disconnects the Current Sense comparator
fromPin4anddisablesitduringthe400firstnsofthepower
switchconduction.Thispreventstheblockfromreactingon
the current spikes that generally occur at power switch turn
on. Consequently, proper operation does not require any
filtering capacitor on Pin 4.
PROTECTIONS
OCP (Overcurrent Protection)
Refer to Current Sense Block.
OVP (Overvoltage Protection)
The feedback current (I
o
) is compared to a threshold
current(I
ovpH
).Ifitexceedsthisvalue,thegatedrivesignal
ismaintainedlowuntilthiscurrentgetslowerthanasecond
level (I
ovpL
).
Figure 30. Internal Current Thresholds
Gate
Drive
Enable
V
control
I
o
I
uvp
I
regL
I
ovpH
I
ovpL
I
regH
So, the OVP upper threshold is:
V
ovpH
= V
pin1
+
r
R
o
?I
ovpH
u
where:
R
o
is the feedback resistor that is connected between
Pin 1 and the output voltage,
I
ovpH
is the internal upper OVP current threshold,
V
pin1
is the Pin 1 clamp voltage.
Practically, V
pin1
that is in the range of 2.5 V, can be
neglected. The equation can then be simplified:
V
ovpH
= R
o
(M? ?I
ovpH
(mA) (V)
On the other hand, the OVP low threshold is:
V
ovpL
= V
pin1
+
r
R
o
?I
ovpL
u
where I
ovpL
is the internal low OVP current threshold.
Consequently, V
pin1
being neglected:
V
ovpL
= R
o
(
M?/DIV>
)
?I
ovpL
(
mA
) (
V
)
The OVP hysteresis prevents erratic behavior.
I
ovpL
is guaranteed to be higher than IregH (refer to
parameters specification). This ensures that the OVP
function doesnt interfere with the regulation one.
UVP (Undervoltage Protection)
This function detects when the feedback current is lower
than14%ofI
ref
.Inthiscase,thePWMlatchisresetandthe
power switch is kept off.
This protection is useful to:
?nbsp Protect the preregulator from working in too low
mains conditions.
?nbsp To detect the feedback current absence (in case of a
nonproper connection for instance).
The UVP threshold is:
V
uvp
H V
pin1
+
r
R
o
(M? ?I
uvp
(mA)
u
(V)
Practically (V
pin1
being neglected),
V
uvp
= R
o
(
M?/DIV>
)
?I
uvp
(
mA
) (
V
)
Maximum On- -Time Limitation
As explained in PWM Latch, the maximum on- -time is
accurately controlled.
Pin Protection
All the pins are ESD protected.
相關PDF資料 |
PDF描述 |
|---|---|
| MC33262DG | IC PFC CONTROLLER CRM 8SOIC |
| MC33368DR2G | IC PFC CONTROLLER CRM 16SOIC |
| MC33567D-1G | IC REG CTRLR DUAL OUT 8-SOIC |
| MCP18480T-I/SS | IC HOT SWAP CTRLR -48V 20SSOP |
| MCP9808T-E/MS | IC TEMP SENSOR DGTL I2C 8MSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC33260P | 功能描述:功率因數校正 IC Critical Conduction RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| MC33260PG | 功能描述:功率因數校正 IC Critical Conduction Mode PFC RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| MC33261 | 制造商:SPC Multicomp 功能描述:HEATSINK TO220/218 16.7/W 制造商:SPC Multicomp 功能描述:HEATSINK TO220/218 16.7C/W 制造商:SPC Multicomp 功能描述:HEAT SINK; Packages Cooled:TO-218 / TO-220; Thermal Resistance:16.7C/W; External Height - Imperial:1"; External Height - Metric:25.4mm; External Width - Imperial:0.654"; External Width - Metric:16.6mm; Heat Sink Material:Aluminium ;RoHS Compliant: Yes |
| MC33261P | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC33262 | 制造商:SPC Multicomp 功能描述:HEATSINK TO220/218 12.9/W 制造商:SPC Multicomp 功能描述:HEATSINK TO220/218 12.9C/W 制造商:SPC Multicomp 功能描述:HEAT SINK; Packages Cooled:TO-218 / TO-220; Thermal Resistance:12.9C/W; External Height - Imperial:1.5"; External Height - Metric:38.1mm; External Width - Imperial:0.654"; External Width - Metric:16.6mm; Heat Sink Material:Aluminium;RoHS Compliant: Yes |
發布緊急采購，3分鐘左右您將得到回復。