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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： | 3/43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.
11
3. Timer latch short-circuit protection function
This IC has a timer latch short-circuit protection circuit that stops the switching operation when the output voltage
drops for a specific time due to output short-circuiting. A capacitor (CSP) that is used to set the delay time of this
short-circuit protection circuit can be connected to the CSP pin.
This IC operates at the maximum duty ratio if the output voltage drops due to output short-circuiting. At the
maximum duty ratio, constant-current charging of CSP starts. If this status lasts for a short-circuit protection
delay time and the CSP pin voltage rises above the reference voltage, the latch mode is set. Note that the latch
mode is different from the shutdown status in that the switching operation is stopped but the internal circuitry
operates normally.
To reset the latch operation to protect the IC from short-circuiting, lower VIN than the UVLO detection voltage.
The latch mode within the short-circuit protection delay time is reset by decreasing VIN to 1.0 V (Typ.) or lower.
Note that the mode is not reset even if the VIN is lowered to the UVLO detection voltage (refer to Figure 9).
Input voltage
(VIN)
Output load
CSP pin voltage
(VCSP)
Latch mode
Short-circuit status
50 ms (CSP
= 0.1 F)
Normal
status
Short-circuit
protection time
Latch
period
Reset period
Short-circuit
protection time
Short-circuit
protection time
UVLO release
UVLO detection
1.0 V
Reference
voltage
Figure 9
4. UVLO function
This IC includes a UVLO (under-voltage lockout) circuit to prevent the IC from malfunctioning due to a transient
status when power is applied or a momentary drop of the power supply voltage. When UVLO is in the detection
state, switching is stopped and the external FET is held in the off status. Once UVLO enters the detection state,
the soft-start function is reset.
Note that the other internal circuits operate normally and that the status is different from the power-off status.
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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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