Description
GW4235 is a microlight collection management charging chip that integrates power management, charge/discharge management, and energy storage device management. The GW4235 can achieve cold start with energy input as low as 400mV and 15μW of power, and after startup, it can obtain DC power from light conversion devices such as solar panels, charge energy storage devices such as rechargeable batteries or supercapacitors, and provide stable operating voltage for different loads through two LDO regulators.
Typical Applications
- Industrial Monitoring
- Home Automation
- Electronic Health Monitoring
- Industrial Internet of Things
- Wireless Sensor Nodes
Basic Application Diagram
Features
Ultra-low power start-up: cold start under 400mV input voltage and 15μW input power
Boost regulator:
→MPPT configured through pins, configured as 70/75/85/90%
→MPPT open circuit voltage detected every 5 seconds
→input voltage range 150mV to 5V after startup.
Low-voltage LDO output:
→support a maximum load current of 20mA
→output voltage 1.2V/1.8V optional
→switch control through pins
High-voltage LDO output:
→maximum load current of 80mA
→output voltage optional/adjustable from 1.8V to 4.2V
→controlled by pins.
Battery management:
→configure overcharge and over discharge protection parameters for rechargeable batteries or supercapacitors
→prompt when the battery is exhausted; prompt when LDO is available
Battery switching:
→automatic switch to primary battery (battery exhausted)
→automatic switch to the energy storage battery (battery recover)
Physical Characteristics
Input voltage:
→Cold start: 0.4V to 5V
→After cold start: 0.15V to 5V
Output voltage:
→Boost converter: 2.2V to 4.5V
→Buck converter: 2V to 2.5V
Energy storage device voltage:
→Rechargeable Batt.: 2.2V to 4.5V
→Capacitance: 0V to 4.5V
Operating junction temp.: -40°C to 125°C
Support
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Sample and Buy
Cascode Technologies
B1503, 128, Beobwon-ro, Songpa-gu, Seoul, 05854, Korea
Touchworld
919ho, 224, Hwangsaeul-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13595, Republic of Korea
Farben
Block B, WeiDa Technology Park, No.15, Gaoxin North 6th road, Songpingshan Community, Xili Street, Nanshan District, Shenzhen, China