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PWM Controller. BIT3260 Datasheet

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PWM Controller. BIT3260 Datasheet






BIT3260 Controller. Datasheet pdf. Equivalent




BIT3260 Controller. Datasheet pdf. Equivalent





Part

BIT3260

Description

High Performance PWM Controller



Feature


Beyond Innovation Technology Co., Ltd. High Performance PWM Controller Version : A1 2012/02/06 Confidential This is an ONE-TIME copy. Updates will not be p rovided page 1 of 7 Beyond Innovation Technology Co., Ltd. Features: Voltage Mode PWM Controller 10V ~ 18V operatio n voltage Current limit Frequency adjus table Internal Soft-Start Maximum duty cycle output Over .
Manufacture

Beyond Innovation Technology

Datasheet
Download BIT3260 Datasheet


Beyond Innovation Technology BIT3260

BIT3260; temperature protection, OTP Internal Und er Voltage Lock Out, UVLO Totem Pole Ou tput SOP-8 Package Pin Layout: 1 VDD OUT 8 2 EA GND 7 3 CMP FREQ 6 4 IN N OCP 5 General Description: The BIT3 260 is a high frequency PWM controller integrates required functions for boost conversion in a small SOP-8 package. A low 0.2V feedback voltage and over cur rent protection ma.


Beyond Innovation Technology BIT3260

ke BIT3260 be an ideal controller for LE D backlight supplies. Frequency adjusta ble is flexible in variable system desi gn. Internal soft start function can av oid inrush current happened in the star t up period. Over temperature protectio n and UVLO make system reliable. CMOS p rocess greatly reduces the operating cu rrent when comparing to similar product s Functional Desc.


Beyond Innovation Technology BIT3260

ription: Over temperature protection O CP FREQ 0.5V + - Triangle wave genera tor Soft start + - 0.2V + INN - C MP Recommended Operating Condition: S upply Voltage.10V ~ 18V Operating Oper ating AFmrebqiueennt cTyemperature.... .1-2000k  Hz~~ 84500  KHz Absolute Ratings VDD...-0.3 ~ +18 V GND...±0.3 V IOSOntpppoeeurarrtaagVtteiionnlTggtae AJgmuempnbecirttaioTt.

Part

BIT3260

Description

High Performance PWM Controller



Feature


Beyond Innovation Technology Co., Ltd. High Performance PWM Controller Version : A1 2012/02/06 Confidential This is an ONE-TIME copy. Updates will not be p rovided page 1 of 7 Beyond Innovation Technology Co., Ltd. Features: Voltage Mode PWM Controller 10V ~ 18V operatio n voltage Current limit Frequency adjus table Internal Soft-Start Maximum duty cycle output Over .
Manufacture

Beyond Innovation Technology

Datasheet
Download BIT3260 Datasheet




 BIT3260
Beyond Innovation Technology Co., Ltd.
High Performance PWM Controller
Version: A1
2012/02/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 1 of 7




 BIT3260
Beyond Innovation Technology Co., Ltd.
Features:
Voltage Mode PWM Controller
10V ~ 18V operation voltage
Current limit
Frequency adjustable
Internal Soft-Start
Maximum duty cycle output
Over temperature protection, OTP
Internal Under Voltage Lock Out, UVLO
Totem Pole Output
SOP-8 Package
Pin Layout:
1 VDD
OUT 8
2 EA
GND 7
3 CMP FREQ 6
4 INN
OCP 5
General Description:
The BIT3260 is a high frequency PWM controller
integrates required functions for boost conversion
in a small SOP-8 package. A low 0.2V feedback
voltage and over current protection make
BIT3260 be an ideal controller for LED backlight
supplies. Frequency adjustable 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 Description:
Over
temperature
protection
OCP
FREQ
0.5V
+
-
Triangle wave
generator
Soft start
0.2V
+
INN -
CMP
Recommended Operating Condition:
Supply Voltage……………………….10V ~ 18V
Operating
Operating
AFmrebqiueennt cTye…m…pe…ra…tur…e….…....1-2000k  Hz~~
84500  KHz
Absolute Ratings
VDD…………………………...…………-0.3 ~ +18 V
GND…………………..………….………±0.3 V
IOSOntpppoeeurarrtaagVtteiionnlTggtaeAJgmuempn…becirt…taioTt…nuermTe…ep…m…e…rpa…et…ur.a…r…etu………re….….….…….…………...+.-.-0-152.55300~~~1  V855D0D    +0.3 V
Digital
control
circuit
Buffer
OUT
2012/02/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 2 of 7




 BIT3260
Beyond Innovation Technology Co., Ltd.
Pin Description:
Pin No.
1
2
3
4
5
6
7
8
Symbol
VDD
EA
CMP
INN
OCP
FREQ
GND
OUT
Descriptions
Power supply
Enable pin
Output of the error amplifier
The inverting input of the error amplifier
Over current protection
Frequency control
Ground pin
Output pin
Functional Description:
Under Voltage Locked Out, UVLO:
The Under-voltage lockout turns-off BIT3260 if the input
voltage drops below the under-voltage lockout threshold. It
turns-on BIT3260 if the input voltage is higher than its
threshold. The hysteresis voltage is about 100mV.
Enable control:
The EA pin controls the state of BIT3260. When EA ¡ 2V,
BIT3260 is enabled. And EA ¢ 0.8V, BIT3260 enters into
shutdown mode operation.
The PWM generator:
The pulse width modulation control circuit includes a
reference voltage, an error amplifier, a ramp wave generator,
and a comparator. A signal input to the INN pin is compared
with reference voltage in the error amplifier, there will be an
error signal output in the error amplifier. This error signal can
be modulated into PWM signal in the comparator output when
it compares to ramp wave signal in the comparator.
Frequency adjustable:
To connect a resistor here in the FREQ pin can set different
output frequency. The formula is as following:
Freq.(kHz)
=
7023
R(k)
Where R is the resistor connected in FREQ pin.
Internal soft-start
Built-in soft-start function is controlled by FREQ pin. To
connect an about 21k £ will set an about 12ms soft start
time.
Over current protection, OCP:
The power switch will pass through too many current when
abnormal conditions happened. BIT3260 will shut off its
output if the OCP pin senses a over current signal. The shut
off status can be reset by reducing the signal input to OCP.
Over Temperature Protection, OTP
BIT3260 provides over temperature protection that is more
reliable for system protection. When the operation
temperature is too high, BIT3260 will shut off its output. When
the temperature of the die drops below the threshold,
recovered, BIT3260 will automatically recover to work again.
2012/02/06
Confidential
This is an ONE-TIME copy. Updates will not be provided
page 3 of 7



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