Datasheet > S-8333CBIA-I8T1U

S-8333CBIA-I8T1U

更新时间： 2024-11-28 00:10:11

品牌	Logo	应用领域
精工 - SII		开关
页数	文件大小	规格书
44页	2669K
描述
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER

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S-8333CBIA-I8T1U 数据手册

S-8333 Series

STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL,

PWM CONTROL SWITCHING REGULATOR CONTROLLER

www.sii-ic.com

Rev.4.2_01

The S-8333 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage circuit, an oscillator,

an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO), and a timer latch short-circuit protection

circuit. Because its minimum operating voltage is as low as 1.8 V, this switching regulator is ideal for the power supply of

an LCD or for portable systems that operate on a low voltage. The internal oscillation frequency can be set up to 1.08 MHz,

via the resistor connected to the ROSC pin.

The maximum duty ratio of PWM control can be controlled by the resistor connected to the RDuty pin. The soft-start

function at power application is accomplished by combining the reference voltage control and maximum duty control

methods. Even if the voltage of the FB pin is retained lower than the reference voltage due to the factor outside the IC, the

output voltage is raised by controlling the maximum duty. The phase compensation and gain value can be adjusted

according to the values of the resistor and capacitor connected to the CC pin. Therefore, the operation stability and

transient response can be correctly set for each application. The reference voltage accuracy is as high as 1.0 V 1.5%, and

any voltage can be output by using an external output voltage setting resistor.

In addition, the delay time of the short-circuit protection circuit can be set by using the capacitor connected to the CSP pin.

If the maximum duty condition continues because of short-circuiting, the capacitor externally connected to the CSP pin is

charged, and oscillation stops after a specific time. The short-circuit protection function is cancelled when the power supply

is raised to the UVLO release voltage after it has been lowered to the UVLO detection voltage. A ceramic capacitor or a

tantalum capacitor is used as the output capacitor, depending on the setting. This controller IC allows various settings and

selections and employs a small package, making it very easy to use.

 Features

• Low voltage operation:

• Oscillation frequency:

• Maximum duty:

1.8 V to 6.0 V

280 kHz to 1.08 MHz (selectable by external resistor)

Settable up to 88.5% by external resistor

47 to 88.5% (oscillation frequency; 500 kHz or more)

47 to 80% (oscillation frequency; less than 500 kHz)

1.0 V 1.5%

• Reference voltage:

• Range of operation temperature: −40 to +85°C

UVLO (under-voltage lockout) function:

Detection voltage can be selected from between 1.5 V and 2.3 V in 0.1 V step.

Hysteresis width can be selected from between 0.1 V and 0.3 V in 0.1 V step.

• Timer latch short-circuit protection circuit:

Delay time can be set using an external capacitor.

•

• Soft-start function:

Soft-start time can be selected in three steps, 10 ms, 15 ms, and 20 ms.

Both reference voltage control and maximum duty control methods are applied

• Phase compensation external setting:

Control is possible via the resistor connected between the CC and GND pins

and capacitor

• Lead-free, Sn 100%, halogen-free^*1

*1. Refer to “ Product Name Structure” for details.

 Applications

• Power supplies for LCDs and CCDs

• Power supplies for portable equipment

 Packages

• SNT-8A

• 8-Pin TSSOP

12 3 4 5 6 7...44

中文翻译

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与S-8333CBIA-I8T1U相关器件

型号	品牌	获取价格	描述	数据表
S-8333CBIA-T8T1S	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIA-T8T1U	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIA-T8T1y	SII	获取价格	STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIB-I8T1U	SII	获取价格	STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIB-T8T1S	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIB-T8T1U	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIB-T8T1y	SII	获取价格	STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIC-I8T1U	SII	获取价格	STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIC-T8T1S	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333CBIC-T8T1U	SII	获取价格	PWM CONTROL SWITCHING REGULATOR CONTROLLER

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