{"id":656,"date":"2021-12-20T13:12:00","date_gmt":"2021-12-20T05:12:00","guid":{"rendered":"https:\/\/ecmos2.liho.work\/?p=656"},"modified":"2024-09-10T13:24:08","modified_gmt":"2024-09-10T05:24:08","slug":"ec3228","status":"publish","type":"post","link":"https:\/\/www.ecmos.com.tw\/en\/dc-converter-buck\/ec3228\/","title":{"rendered":"EC3228\uff5cHigh-Performance PWM Controller"},"content":{"rendered":"\n
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General Description<\/h3>\n\n\n\n

The EC3228 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs.<\/p>\n\n\n\n

The EC3228 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers.<\/p>\n\n\n\n

The EC3228 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode.<\/p>\n\n\n\n

In Pulse Frequency Mode (PFM), the EC3228 provides very high efficiency over light to heavy loads with loading\u0002modulated switching frequencies.<\/p>\n\n\n\n

In PWM Mode, the converter works nearly at constant frequency for low-noise requirements.<\/p>\n\n\n\n

The EC3228 is equipped with accurate positive current\u0002limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-On\u0002Reset function monitors the voltage on VCC to prevent
wrong operation during power-on.<\/p>\n\n\n\n

The EC3228 has a 1ms digital soft-start and built-in an integrated output discharge method for soft-stop.<\/p>\n\n\n\n

An internal integrated soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current.<\/p>\n\n\n\n

A soft-stop function actively discharges the output capacitors with controlled reverse inductor current.<\/p>\n\n\n\n

The EC3228 is available in 10pin TDFN 3×3 package.<\/p>\n\n\n\n

Features<\/h3>\n\n\n\n

\u25c6 Adjustable Output Voltage from +0.7V to +5.5V
\u25c6 0.7V Reference Voltage
\u25c6 \u00b11% Accuracy Over-Temperature
\u25c6 Operates from an Input Battery Voltage Range of
+1.8V to +32V
\u25c6 Power-On-Reset Monitoring on VCC Pin
\u25c6 Excellent Line and Load Transient Responses
\u25c6 PFM Mode for Increased Light Load Efficiency
\u25c6 Selectable PWM Frequency from 4 Preset Values
\u25c6 Integrated MOSFET Drivers
\u25c6 Integrated Bootstrap Forward P-CH MOSFET
\u25c6 Adjustable Integrated Soft-Start and Soft-Stop
\u25c6 Selectable Forced PWM or Automatic PFM\/PWM Mode
\u25c6 Power Good Monitoring
\u25c6 70% Under-Voltage Protection
\u25c6 125% Over-Voltage Protection
\u25c6 Adjustable Current-Limit Protection
\u25c6 Using Sense Low-Side MOSFET\u2019s RDS(ON)
\u25c6 Over-Temperature Protection
\u25c6 TDFN-10 3×3 Package
\u25c6 Lead Free and Green Devices Available (RoHS Compliant)<\/p>\n\n\n\n

Applications<\/h3>\n\n\n\n

\u25c6 Notebook
\u25c6 Table PC
\u25c6 Hand-Held Portable
\u25c6 AIO PC
\u25c6 LCD Monitor \/ TV
\u25c6 Battery Charger
\u25c6 ADSL Modem
\u25c6 Telecom \/ Networking Equipment<\/p>\n\n\n\n

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