电压模式脉宽调制控制CXSD62397快速瞬态响应同步整流buck拓扑中驱动两个N通道mosfet大功率DC转换器恒定300kHz开关频率

The CXSD62397 provides complete control and protection for a DC-DC converter for high power applications. It is designed to drive two N-channel MOSFETs in a synchronous-rectified buck topology. The CXSD62397 integrates all of the control, bootstrap diode and protection functions into a single package. The CXSD62397 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 300kHz free-running triangle-wave oscillator. The error amplifier features a 15MHz gain-bandwidth product which provides high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0% to 80%. The reference voltage is 0.8V, 2% accuracy. The CXSD62397 has internal soft start and executes cycle-by-cycle current limit during soft start interval. The CXSD62397 monitors the current by using the RDS(ON) of the low-side MOSFET which eliminates the need for a current sensing resistor. The under-voltage protection function monitors voltage at FB pin. The over-current and under-voltage events after soft-start interval trigger hiccup mode protection.

产品特点 返回TOPmwE嘉泰姆

„ Drives Two N-Channel MOSFETs mwE嘉泰姆

„ Operates at 5V to 24V Supply Voltage mwE嘉泰姆

„ Internal Bootstrap Diode Circuit mwE嘉泰姆

„ Voltage-Mode PWM Control mwE嘉泰姆

„ Fast Transient Response mwE嘉泰姆

„ 0.8V, 2% Accuracy Reference Voltage mwE嘉泰姆

„ Internal Soft Start mwE嘉泰姆

„ Constant 300kHz Switching Frequency mwE嘉泰姆

„ Over-Current Fault Monitors by Using Low-Side MOSFET RDS(ON) mwE嘉泰姆

„ Output Under-Voltage ProtectionmwE嘉泰姆

应用范围 返回TOPmwE嘉泰姆

„ 16V to 30V Input High Power DC-DC Regulators mwE嘉泰姆

„ Low-Voltage Distributed Power SuppliesmwE嘉泰姆

技术规格书（产品PDF) 返回TOP mwE嘉泰姆

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QQ截图20160419174301.jpg mwE嘉泰姆

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Synchronous Step Down ControllermwE嘉泰姆
Part NO.mwE嘉泰姆	Vin(V)mwE嘉泰姆 minmwE嘉泰姆	Vin(V)mwE嘉泰姆 maxmwE嘉泰姆	IOUTmwE嘉泰姆 (A)mwE嘉泰姆	FSWmwE嘉泰姆 (kHz)mwE嘉泰姆	FBmwE嘉泰姆 (V)mwE嘉泰姆	DutymwE嘉泰姆 max(%)mwE嘉泰姆	VOUTmwE嘉泰姆 (ms)mwE嘉泰姆	NotemwE嘉泰姆	PackagemwE嘉泰姆
CXSD62393mwE嘉泰姆	2.5mwE嘉泰姆	5.5mwE嘉泰姆	--mwE嘉泰姆	300mwE嘉泰姆	1mwE嘉泰姆	100mwE嘉泰姆	15mwE嘉泰姆	EXT, VDD, GND, CE, FB, Voltage ModemwE嘉泰姆	SOT-23-5mwE嘉泰姆
CXSD62394mwE嘉泰姆	5mwE嘉泰姆	12mwE嘉泰姆	OCSETmwE嘉泰姆	300mwE嘉泰姆	0.8mwE嘉泰姆	--mwE嘉泰姆	14mwE嘉泰姆	BST, DH, GND, DL, VCC, FB, OC, LXmwE嘉泰姆	SOP-8mwE嘉泰姆
CXSD62395mwE嘉泰姆	--mwE嘉泰姆	24mwE嘉泰姆	OCSETmwE嘉泰姆	300mwE嘉泰姆	0.8mwE嘉泰姆	--mwE嘉泰姆	8mwE嘉泰姆	BST, DH, GND, DL, VCC, FB, OC, LXmwE嘉泰姆	SOP-8mwE嘉泰姆
CXSD62396mwE嘉泰姆	10mwE嘉泰姆	28mwE嘉泰姆	--mwE嘉泰姆	400mwE嘉泰姆	0.8mwE嘉泰姆	80mwE嘉泰姆	3mwE嘉泰姆	VCC, DL, GND, DH, BST, LX, VIN, FBmwE嘉泰姆	TSOT-23-8mwE嘉泰姆
CXSD62397mwE嘉泰姆	5mwE嘉泰姆	23mwE嘉泰姆	OCSETmwE嘉泰姆	400mwE嘉泰姆	0.8mwE嘉泰姆	80mwE嘉泰姆	8mwE嘉泰姆	DH, LX, DL, GND, FB, OC, VCC, BSTmwE嘉泰姆	SOP-8mwE嘉泰姆
CXSD62398mwE嘉泰姆	4.5mwE嘉泰姆	27mwE嘉泰姆	RSENSEmwE嘉泰姆	ADJmwE嘉泰姆	0.7mwE嘉泰姆	93mwE嘉泰姆	ADJmwE嘉泰姆	Asynchronous Voltage Mode ControllermwE嘉泰姆	MSOP-10(FD)mwE嘉泰姆