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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： | 9/43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
Rev.2.3_00
S-8333 Series
Seiko Instruments Inc.
17
6. Short-circuit protection delay time setting capacitor (CSP)
With the S-8333 Series, the short-circuit protection delay time can be set to any value by an external capacitor.
Connect the capacitor across the CSP and VSS pins. Select the capacitance by using the following equation and
referring to Figure 14. However, the following equation and figure assume that the capacitor value is the desired
value and show the theoretical values when the IC is in the typical conditions. Note that fluctuations of capacitor
and IC are not considered.
CSP [
F]
1.0
tPRO [ms]
× 2 × 10
3
120
100
80
60
40
20
0
0.10
0.20
0.25
t PR
O
[ms]
CSP [
F]
0.05
0.15
Figure 14 CSP vs. tPRO
7. Output voltage setting resistors (RFB1, RBF2)
With the S-8333 Series, the output voltage can be set to any value by external divider resistors.
Connect the divider resistors across the VOUT and VSS pins. Because VFB
= 1 V, the output voltage can be
calculated by this equation.
=
VOUT
RFB2
(RFB1
+ RFB2)
Connect divider resistors RFB1 and RFB2 as close to the IC to minimize effects from of noise. If noise does have
an effect, adjust the values of RFB1 and RFB2 so that RFB1
+ RFB2 < 100 k.
CFB connected in parallel with RFB1 is a capacitor for phase compensation. Select the optimum value of this
capacitor at which the stable operation can be ensured from the values of the inductor and output capacitor.
8. Phase compensation setting resistor and capacitor (RZ, CZ)
The S-8333 Series needs appropriate compensation for the voltage feedback loop to prevent excessive output
ripple and unstable operation from deteriorating the efficiency. This compensation is implemented by connecting
RZ and CZ in series across the CC and VSS pins. RZ sets the high-frequency gain for a high-speed transient
response. CZ sets the pole and zero of the error amplifier and keeps the loop stable. Adjust RZ and CZ, taking
into consideration conditions such as the inductor, output capacitor, and load current, so that the optimum
transient characteristics can be obtained.
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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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