1.产品概述                       2.产品特点GX0嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 GX0嘉泰姆
5.产品封装图                     6.电路原理图                   GX0嘉泰姆
7.功能概述                        8.相关产品GX0嘉泰姆

七,功能概述GX0嘉泰姆

VCC and VIN Power-On-Reset (POR)GX0嘉泰姆
TThe CXSD62152/A keeps monitoring the voltage on VIN and VCC pins to prevent wrong logic operations whichGX0嘉泰姆
may occur when VIN or VCC voltage is not high enough for internal control circuitry to operate. The VCC POR ris-GX0嘉泰姆
ing threshold is 2.7V (typical) with 0.2V hysteresis and VIN POR rising threshold is 2.3V with 0.05V hysteresis.GX0嘉泰姆
During startup, the VCC and VIN voltage must exceed the POR threshold. Then the IC starts a starts-up processGX0嘉泰姆
and ramps up the output voltage to the voltage target. GX0嘉泰姆
Output Under-Voltage Protection (UVP)GX0嘉泰姆
In the operational process, if a short-circuit occurs, the output voltage will drop quickly. Before the current-limitGX0嘉泰姆
circuit responds, the output voltage will fall out of the required regulation range. The under-voltage continuallyGX0嘉泰姆
monitors the FB voltage after soft-start is completed. If a load step is strong enough to pull the output voltage lowerGX0嘉泰姆
than the under-voltage threshold, the IC shuts down converter’s output.The under-voltage threshold is 50% of theGX0嘉泰姆
nominal out put voltage. The under-voltage comparator has a built-in 3μs noise filter to prevent the chips from wrongGX0嘉泰姆
UVP shut down being caused by noise. The CXSD62152/A will be latched after under-voltage protection.GX0嘉泰姆
Over-Voltage Protection (OVP)GX0嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increases over 125% of theGX0嘉泰姆
reference voltage due to the high-side MOSFET failure or for other reasons, the over-voltage protection comparatorGX0嘉泰姆
will force the low-side MOSFET gate driver high till the occurence of low-side current limit. This action activelyGX0嘉泰姆
pulls down the output voltage. As soon as the output voltage is less than 0.2V, the CXSD62152/A will be latched offGX0嘉泰姆
and needs a POR or enable to recover to normal operation.GX0嘉泰姆
Over-Temperature Protection (OTP)GX0嘉泰姆
The over-temperature circuit limits the junction tempera ture of the CXSD62152/A. When the junction temperatureGX0嘉泰姆
exceeds TJ = 160oC, a thermal sensor turns off the both power MOSFETs, allowing the devices to cool.GX0嘉泰姆
The thermal sensor allows the converters to start a start up process and to regulate the output voltage again afterGX0嘉泰姆
the junction temperature cools by 50oC. The OTP is designed with a 50oC hysteresis to lower the average TJGX0嘉泰姆
during continuous thermal overload conditions, increasing lifetime of the CXSD62152/A.GX0嘉泰姆
Current-Limit Protection GX0嘉泰姆
The CXSD62152/A monitors the output current, flows through the high-side and low-side power MOSFETs, and limitsGX0嘉泰姆
the current peak at current-limit level to prevent the IC from damaging during overload, short-circuit and over-GX0嘉泰姆
voltage conditions. Typical high side power MOSFET current limit is 3A, and low side MOSFET current limit is 1.9A.GX0嘉泰姆
 Soft-StartGX0嘉泰姆
The CXSD62152/A has a built-in soft-start to control the rise rate of the output voltage and limit the input current surgeGX0嘉泰姆
during start-up. During soft-start, an internal voltage ramp connected to one of the positive inputs of the errorGX0嘉泰姆
amplifier, rises up from 0V to 0.95V to replace the reference voltage (0.8V) until the voltage ramp reaches theGX0嘉泰姆
reference voltage. During soft-start without output overvoltage, the CXSD62152/A converter¡|s sinking capability isGX0嘉泰姆
disabled until the output voltage reaches the voltage target.GX0嘉泰姆
Soft-StopGX0嘉泰姆
At the moment of shutdown controlled by EN signal, under-voltage event or over-temperature protection, theCXSD62152/A initiates a soft-stop process to discharge the output voltage in the output capacitors. Certainly, the loadGX0嘉泰姆
current also discharges the output voltage. During softstop, the internal voltage ramp (VRAMP) falls down from 0.GX0嘉泰姆
95V to 0V to replace the reference voltage. Therefore, the output voltage falls down slowly at the light load. After theGX0嘉泰姆
soft-stop interval elapses, the soft-stop process ends and the IC turns on the low-side power MOSFET.GX0嘉泰姆
八,相关产品                更多同类产品.......GX0嘉泰姆

Switching Regulator > Buck ConverterGX0嘉泰姆
Part_No GX0嘉泰姆	PackageGX0嘉泰姆	ArchitectuGX0嘉泰姆	No.ofGX0嘉泰姆 PWM GX0嘉泰姆 OutpuGX0嘉泰姆	DriveGX0嘉泰姆 LoutGX0嘉泰姆 (A) GX0嘉泰姆	Vin(V) GX0嘉泰姆		FmaxGX0嘉泰姆 Khz GX0嘉泰姆	Vref GX0嘉泰姆 (V) GX0嘉泰姆	R-Top (milohm) GX0嘉泰姆	R-Sync (milohm) GX0嘉泰姆	Iq (No load) (uA) GX0嘉泰姆
					minGX0嘉泰姆	maxGX0嘉泰姆
CXSD62122GX0嘉泰姆	TQFN5x6-28GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	5GX0嘉泰姆	4.5GX0嘉泰姆	26GX0嘉泰姆	380GX0嘉泰姆	0.8GX0嘉泰姆	50GX0嘉泰姆	20GX0嘉泰姆	1000GX0嘉泰姆
CXSD62123GX0嘉泰姆	SOP-8GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	2GX0嘉泰姆	4.5GX0嘉泰姆	26GX0嘉泰姆	380GX0嘉泰姆	0.8GX0嘉泰姆	100GX0嘉泰姆		1000GX0嘉泰姆
CXSD62124GX0嘉泰姆	SOP-8PGX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	4GX0嘉泰姆	4.5GX0嘉泰姆	26GX0嘉泰姆	380GX0嘉泰姆	0.8GX0嘉泰姆	80GX0嘉泰姆		1000GX0嘉泰姆
CXSD62125GX0嘉泰姆	SOT23-5|TSOT23-5GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	25GX0嘉泰姆
CXSD62125AGX0嘉泰姆	SOT23-5GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆
CXSD62126GX0嘉泰姆	SOP-8GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	3GX0嘉泰姆	4.3GX0嘉泰姆	14GX0嘉泰姆	500GX0嘉泰姆	0.8GX0嘉泰姆	70GX0嘉泰姆	70GX0嘉泰姆	500GX0嘉泰姆
CXSD62127GX0嘉泰姆	SOP-8PGX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	3GX0嘉泰姆	4.3GX0嘉泰姆	14GX0嘉泰姆	500GX0嘉泰姆	0.8GX0嘉泰姆	55GX0嘉泰姆	45GX0嘉泰姆	500GX0嘉泰姆
CXSD62128BGX0嘉泰姆	TDFN3x3-10GX0嘉泰姆			3GX0嘉泰姆	2.6GX0嘉泰姆	5.5GX0嘉泰姆	2000GX0嘉泰姆	0.8GX0嘉泰姆	110GX0嘉泰姆	110GX0嘉泰姆	460GX0嘉泰姆
CXSD62129GX0嘉泰姆	TDFN3x3-10GX0嘉泰姆	CMGX0嘉泰姆	2GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	500GX0嘉泰姆
CXSD62129AGX0嘉泰姆	TDFN3x3-10GX0嘉泰姆	CMGX0嘉泰姆	2GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆
CXSD62130GX0嘉泰姆	TDFN2x2-6GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	25GX0嘉泰姆
CXSD62130AGX0嘉泰姆	TDFN2x2-6GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆
CXSD62131GX0嘉泰姆	TDFN3x3-12GX0嘉泰姆	CMGX0嘉泰姆	2GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	25GX0嘉泰姆
CXSD62131AGX0嘉泰姆	TDFN3x3-12GX0嘉泰姆	CMGX0嘉泰姆	2GX0嘉泰姆	1GX0嘉泰姆	2.7GX0嘉泰姆	6GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆
CXSD62131CGX0嘉泰姆	TDFN 3x3 12GX0嘉泰姆	CMGX0嘉泰姆	2GX0嘉泰姆	1GX0嘉泰姆	3GX0嘉泰姆	5.5GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	30GX0嘉泰姆
CXSD62132GX0嘉泰姆	TQFN3x3-20GX0嘉泰姆	CMGX0嘉泰姆	3GX0嘉泰姆	2GX0嘉泰姆	2.9GX0嘉泰姆	5.5GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	-GX0嘉泰姆	-GX0嘉泰姆	300GX0嘉泰姆
CXSD62133GX0嘉泰姆	TDFN2x2-8GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	1GX0嘉泰姆	3.3GX0嘉泰姆	8GX0嘉泰姆	1500GX0嘉泰姆	0.6GX0嘉泰姆	280GX0嘉泰姆	250GX0嘉泰姆	25GX0嘉泰姆
CXSD62134GX0嘉泰姆	SOP-8GX0嘉泰姆	CMGX0嘉泰姆	1GX0嘉泰姆	2GX0嘉泰姆	4.5GX0嘉泰姆	24GX0嘉泰姆	340GX0嘉泰姆	0.925GX0嘉泰姆	110GX0嘉泰姆	110GX0嘉泰姆	1900GX0嘉泰姆
上一篇：CXSD62151欠压锁定软启动过温和限流保护等功能宽输入电压从4.5伏到24伏 2.5A连续输出电流 下一篇：3.2A 5V 1MHz同步降压变换器CXSD62153 85mW高压侧和75mW低压侧功率mosfet电流模式控制可调输出电压 发表评论 共有条评论 用户名: 密码: 验证码: 匿名发表