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BIT3267 の電気的特性と機能

BIT3267のメーカーはBeyond Innovation Technologyです、この部品の機能は「High Performance PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 BIT3267
部品説明 High Performance PWM Controller
メーカ Beyond Innovation Technology
ロゴ Beyond Innovation Technology ロゴ 




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BIT3267 Datasheet, BIT3267 PDF,ピン配置, 機能
Beyond Innovation Technology Co., Ltd.
High Performance PWM Controller
Version: A3
Please read the notice stated in this preamble carefully before
accessing any contents of the document attached.
Admission of BiTEK’s statement therein is presumed once the
document is released to the receiver.
2013/01/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 1 of 8

1 Page





BIT3267 pdf, ピン配列
Beyond Innovation Technology Co., Ltd.
Features:
Current mode PWM controller
8V ~ 28V operation voltage
Over current protection, OCP
Over voltage protection, OVP
Load short protection, LSP
Frequency selection
Internal soft-start
Over temperature protection, OTP
Internal under voltage lock out, UVLO
Totem pole output
SOP-8 package
Pin layout:
1 OUT
2 GND
3 OCP
4 OVP
VDD
EA
CMP
INN
8
7
6
5
General description:
The BIT3267 is a high frequency PWM
controller integrates required functions for boost
conversion in a small SOP-8 package. A low
0.21V feedback voltage, over voltage protection
and over current protection and load short
protection make BIT3267 to be an ideal
controller for LED backlight supplies. Frequency
selection is flexible in variable system design.
Internal soft start function can avoid inrush
current happened in the start up period. Over
temperature protection and UVLO make system
reliable. CMOS process greatly reduces the
operating current when comparing to similar
products
Functional block diagram:
OVP
2V +
-
EA
OCP
0.3V
+
-
CMP
Soft start
¡
0.21V
INN
+
-
LSP protection
Recommended operating condition:
Supply voltage……………………….8V ~ 28V
Operating
Operating
afrmeqbuieenntctye…m…pe…ra…tur.e2…2.0..k-H20z/1  10k~H8z5/55  kHz
Absolute ratings
VDD…………………………...…………-0.3 ~ +28 V
GND…………………..………….………±0.3 V
OISOntpppoeeurarrtaagvtteoiinnlttggeamgajuempn…ecbrti…ieaontnu…trttee…e…mm…p…pe…e…rraa.…t…tuur…r…ee……..….….…………....+...--1-20550.530~~~  18V55D0  D  +0.3 V
Frequency
selection
Digital
control
circuit
Over
temperature
protection
Buffer
OUT
2013/01/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 3 of 8


3Pages


BIT3267 電子部品, 半導体
Beyond Innovation Technology Co., Ltd.
+
-
Frequency
selection
0.3V
OCP
RFRE Q
RMOS
The current limit is real time and estimated as following:
I MOS
=
0.3
RMOS
When OCP pin senses an over current signal, BIT3267 shut
off its output. The shut off status can be reset by reducing the
signal input to OCP.
reliable for system protection. When the operation
temperature is too high, BIT3267 will shut off the output.
When the temperature of the die drops below the threshold,
BIT3267 will automatically recover to work again.
Load short protection, LSP:
The voltage of INN pin is monitored whenever it is over 1V
then BIT3267 will latch-off its output. When LED is short, VFB
detects a higher than 1V voltage in the LSP protection
comparator, BIT3267 latch-off its output.
Internal soft-start
When VDD is ready and EA receives a high signal, BIT3267
soft-start function is worked. The internal soft-start time is
about 18.55ms.
Over voltage protection, OVP:
The output voltage is detected in OVP pin. When there is a
voltage higher than 2V happened in this pin, BIT3267 will
latch-off its output.
VO UT
VFB
RLED
INN 0.21V
+
-
1V
CMP
+
-
LSP protection
RMOS
R1
OVP
2V
R2
VFB
RLED
The OVP voltage is as following:
OVP
=
R2
R1 + R2
VOUT
Over temperature protection, OTP
BIT3267 provides over temperature protection that is more
2013/01/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 6 of 8

6 Page



ページ 合計 : 8 ページ
 
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[ BIT3267 データシート.PDF ]


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共有リンク

Link :


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BIT3267

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