CXSD61022A

CXSD61022A wide input voltage, high efficiency CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode

CXSD61022A wide input voltage, high efficiency CC step-down DC/DC converter that operates in either

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产品简介

目录1K6嘉泰姆

1.产品概述                       2.产品特点1K6嘉泰姆
3.应用范围                       4.产品封装图1K6嘉泰姆
5.电路原理图                   6.产品PCB                   1K6嘉泰姆
7.产品BOM                      8.产品PDF文档 1K6嘉泰姆
9.功能概述                      10.
相关产品1K6嘉泰姆

 

一,产品概述(General Description)     1K6嘉泰姆


    CXSD61022A is a wide input voltage, high efficiency CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. CXSD61022A provides up to 2.5A output current at 125kHz switching frequency.1K6嘉泰姆
      CXSD61022A provides OVP pin for output over voltage protection.Protection features include cycle-by-cycle current limit,thermal shutdown, and frequency foldback at short circuit. The devices are available in a SOP-8EP package and require very few external devices for operation.1K6嘉泰姆
二.产品特点(Features)1K6嘉泰姆


42V Input Voltage Surge1K6嘉泰姆
40V Steady State Operation1K6嘉泰姆
Up to 2.5A output current1K6嘉泰姆
Output Voltage 2.5V to 10V1K6嘉泰姆
Resistor Programmable1K6嘉泰姆

− Current Limit from 1A to 2.5A1K6嘉泰姆
− Cable Compensation from 0Ω to 0.4Ω1K6嘉泰姆

±7.5% CC Accuracy
− Compensation of Input /Output Voltage Change
− Temperature Compensation1K6嘉泰姆
2% Feedback Voltage Accuracy1K6嘉泰姆
Up to 94% Efficiency1K6嘉泰姆
125kHz Switching Frequency Eases EMI Design1K6嘉泰姆
Advanced Feature Set1K6嘉泰姆
− Integrated Soft Start
− Thermal Shutdown1K6嘉泰姆
− Protection Against Shorted ISET Pin1K6嘉泰姆
Patented E-LTI technology improves1K6嘉泰姆
transient response.1K6嘉泰姆
SOP-8EP Package1K6嘉泰姆
三,应用范围 (Applications)1K6嘉泰姆


 Car Charger/ Adaptor1K6嘉泰姆
Rechargeable Portable Devices1K6嘉泰姆
General-Purpose CC/CV Supply1K6嘉泰姆
四,产品封装图 (Package)1K6嘉泰姆
blob.png1K6嘉泰姆

Pin1K6嘉泰姆
No.1K6嘉泰姆

NAME1K6嘉泰姆

Description1K6嘉泰姆

11K6嘉泰姆

HSB1K6嘉泰姆

High Side Bias Pin. This provides power to the internal high-side MOSFET gate driver.Connect a 100nF capacitor from HSB pin to SW pin.1K6嘉泰姆

21K6嘉泰姆

IN1K6嘉泰姆

Power Supply Input. Bypass this pin with a 10μF ceramic capacitor to GND, placed as close to the IC as possible.1K6嘉泰姆

31K6嘉泰姆

SW1K6嘉泰姆

Power Switching Output to External Inductor.1K6嘉泰姆

41K6嘉泰姆

GND1K6嘉泰姆

Ground. Connect this pin to a large PCB copper area for best heat dissipation. Return FB,COMP, and ISET to this GND, and connect this GND to power GND at a single point for best noise immunity.1K6嘉泰姆

51K6嘉泰姆

FB1K6嘉泰姆

Feedback Input. The voltage at this pin is regulated to 0.800V. Connect to the resistor divider between output and GND to set the output voltage.1K6嘉泰姆

61K6嘉泰姆

LCOMP1K6嘉泰姆

Output cable resistance compensation.1K6嘉泰姆

71K6嘉泰姆

OVP/EN1K6嘉泰姆

CXSD61022A: OVP input. If the voltage at this pin exceeds 1.25V, the IC shuts down high-side switch.CXSD61022B: EN input. If the voltage at this pin is below 1.5V, the IC remains shut-off.1K6嘉泰姆

81K6嘉泰姆

ISET1K6嘉泰姆

Output Current Setting Pin. Connect a resistor from ISET to GND to program the out putcurrent.1K6嘉泰姆

 

Exposed1K6嘉泰姆
Pad1K6嘉泰姆

Heat Dissipation Pad. Connect this exposed pad to large ground copper area with copper and vias.1K6嘉泰姆

五,电路原理图1K6嘉泰姆
blob.png1K6嘉泰姆

六, 产品PCB1K6嘉泰姆
blob.png1K6嘉泰姆

七.产品BOM  1K6嘉泰姆
  (略)1K6嘉泰姆
八.产品PDF文档 1K6嘉泰姆


需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持1K6嘉泰姆

 QQ截图20160419174301.jpg1K6嘉泰姆

九,功能概述1K6嘉泰姆


CV/CC Loop Regulation1K6嘉泰姆
As seen in Functional Block Diagram, the CXSD61022A is1K6嘉泰姆
a Constant On Time (COT) mode pulse width1K6嘉泰姆
modulation (PWM) converter with CC and CV control.1K6嘉泰姆
The converter operates as follows:1K6嘉泰姆
The main loop of CXSD61022A uses a COT mode control1K6嘉泰姆
which provides a very fast transient response with no1K6嘉泰姆
external component and no need loop compensation.1K6嘉泰姆
The CXSD61022A also adopt a proprietary circuit that1K6嘉泰姆
ensures enable use very low ESR capacitor to maintain1K6嘉泰姆
loop stability.1K6嘉泰姆
turns on. The high side MOSFET is turn off after1K6嘉泰姆
internal one shot timer expires. This one shot time is1K6嘉泰姆
set by VIN and VOUT to maintain a constant frequency.1K6嘉泰姆
The one shot timer is reset and high side MOSFET1K6嘉泰姆
turns on again when feedback voltage falls below the1K6嘉泰姆
reference voltage. An internal ramp is generating to1K6嘉泰姆
simulate output ripple, eliminating the need for ESR1K6嘉泰姆
induced output ripple from COT control mode. When1K6嘉泰姆
high side MOSFET turns off, the SW node of the1K6嘉泰姆
inductor swings to a diode voltage below ground,1K6嘉泰姆
causing the inductor current to decrease and magnetic1K6嘉泰姆
energy to be transferred to output. This state continues1K6嘉泰姆
until the next cycle start again1K6嘉泰姆
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