参数资料
| 型号： | SP6120EY-L |
| 厂商： | Exar Corporation |
| 文件页数： | 10/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 16TSSOP |
| 标准包装： | 95 |
| 系列： | AnyFET™ |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 550kHz |
| 占空比： | 95% |
| 电源电压： | 3 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
THEORY OF OPERATIONS: Continued
finite propagation delay of the controller. When
the SS voltage reaches 2.0V, the secondary loop
including the 3% window comparator is en-
abled. Lastly, the SS voltage is clamped at 2.4V,
ending the soft start charge cycle.
Hiccup Mode
When the converter enters a fault mode, the
driver holds the high side and low side MOSFETs
off for a finite period of time. Provided the part
is enabled, this time is set by the discharge of the
SS capacitor. The discharge time is roughly 10
times the charge interval thereby giving the
power supply plenty of time to cool during an
over current fault. The driver off-time is pre-
dominantly determined by the discharge time.
2.4V
Restart will occur just like a normal soft start
cycle.
However, if a fault occurs during the soft start
charge cycle, the FAULT latch is immediately
set, turning off the high side and low side
MOSFETs. The MOSFETs remain off during
the remainder of the charge cycle and subse-
quent discharge cycle of the SS capacitor. Again,
provided there are no external fault conditions,
the FAULT latch will be reset when the SS
voltage reaches 250 mV.
Over Current Protection
The SP6120 over current protection scheme is
designed to take advantage of three popular
detection schemes: Sense Resistor, Trace Resis-
tor or Inductor Sense. Because the detection
threshold is only 43mV, both trace resistor and
inductor sense become attractive protection
SS Voltage
2.0V
schemes. The inductor sense scheme adds no
Voltage
0.7V
0.25V
0V
Error Amplifier
Reference
1.25V
0V
I LOAD
Inductor Current
dV SS /dt = 50 μ A/C SS
V OUT = V(Eamp REF)* (1+RF/RI)
additional dc loss to the converter and is an
excellent alternative to Rdson based schemes;
providing continuous current sensing and flex-
ible MOSFET selection. An internal, 10 μ s filter
conditions the over current signal from tran-
sients generated during load steps. In addition,
because the over current inputs, ISP and ISN,
are capable of rail to rail operation, the SP6120
provides excellent over current protection dur-
ing conditions where V IN approaches V OUT .
0V
V(V CC )
FAULT
Reset Voltage
0V
V(V CC )
SWN
Voltage
0V
V(V CC )
3% Low
Enable Voltage
0V
TIME
43mV
V(ISP) - V(ISN)
0V
2.4V
2.0V
SS Voltage
250mV
0V
V(V CC )
FAULT Voltage
0V
Date: 1/21/05
SP6120 Low Voltage, AnyFET TM , Synchronous, Buck Controller
10
? Copyright 2005 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6120EY-L/TR | 功能描述:DC/DC 开关控制器 Low Voltage, AnyFET Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| SP6120HV | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| SP6120HVCY | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| SP6120HVCY/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
| SP6120HVEY | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Voltage, Synchronous ,Buck Controller Ideal for 2A to 20A, High Performance, DC-DC Power Converters |
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