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| 型号： | S-8333ACIC-T8T1G |
| 元件分类： | 稳压器 |
| 英文描述： | 0.16 A SWITCHING CONTROLLER, 1133 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | LEAD FREE, TSSOP-8 |
| 文件页数： | 4/43页 |
| 文件大小： | 588K |
| 代理商： | S-8333ACIC-T8T1G |
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STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333 Series
Rev.2.3_00
Seiko Instruments Inc.
12
5. Error amplifier
The error amplifier outputs the PWM control signal so that the voltage of the FB pin is held at a specific value (1
V). By connecting a resistor (RZ) and capacitor (CZ) to the output pin (CC pin) of the error amplifier in series, an
optional loop gain can be set, enabling stabilized phase compensation.
6. Operation
The following are basic equations [(1) through (7)] of the step-up switching regulator (refer to Figure 10).
D
L
CL
M1
FB
CONT
VIN
EXT
VSS
VOUT
Figure 10 Step-up Switching Regulator Circuit for Basic Equations
Voltage at the CONT pin at the moment M1 is turned ON (current IL flowing through L is zero), VA:
VA
= VS
*1 ................................................................................................................................................. (1)
*1.
VS: Non-saturated voltage of M1
Change in IL over time:
L
V
L
V
dt
dl
S
IN
L
=
............................................................................................................................. (2)
Integration of the above equation:
t
L
V
I
S
IN
L
=
.................................................................................................................................... (3)
IL flows while M1 is ON (ton). This time is determined by the oscillation frequency of OSC.
Peak current (IPK) after tON:
ON
S
IN
PK
t
L
V
I
=
.............................................................................................................................. (4)
The energy stored in L is represented by
()2
PK
I
L
2
1
.
When M1 is turned OFF (tOFF), the energy stored in L is released via a diode, generating a reverse voltage (VL).
VL:
(
)
IN
2
*
D
OUT
L
V
+
=
......................................................................................................................... (5)
*2.
VD: Diode forward voltage
The voltage on the CONT pin rises only by VOUT
+ VD.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S-8333CCBC-T8T1U | 功能描述:IC REG CTRLR BOOST 8TSSOP 制造商:ablic u.s.a. inc. 系列:- 包装:剪切带（CT） 零件状态:在售 输出类型:晶体管驱动器 功能:升压 输出配置:正 拓扑:升压 输出数:1 输出阶段:1 电压 - 电源（Vcc/Vdd）:1.8 V ~ 6 V 频率 - 开关:280kHz ~ 1.08MHz 占空比（最大）:0.89 同步整流器:无 时钟同步:无 串行接口:- 控制特性:限流，频率控制 工作温度:-40°C ~ 85°C（TA） 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商器件封装:8-TSSOP 标准包装:1 |
| S-8335A120FT | 功能描述:开关变换器、稳压器与控制器 Dual Pos/Neg 3 Ch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| S-8335A120FT-TB-G | 功能描述:开关变换器、稳压器与控制器 Dual Pos/Neg 3 Ch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| S-8335A160FT | 功能描述:开关变换器、稳压器与控制器 Dual Pos/Neg 3 Ch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| S-8335A160FT-TB-G | 功能描述:开关变换器、稳压器与控制器 Dual Pos/Neg 3 Ch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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