EC49020

4D25N-Rev.P001

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High Efficiency 2A 1.5MHz

Single Cell Li-ion Battery Switching Charger

Detailed Description

The EC49020 family is an integrated charger optimized for charging 1-cell Li-ion or Li-polymer batteries. It charges a

battery with constant current (CC) and constant voltage (CV) profile. The typical charge profile is illustrated

in Figure 2.

Figure 2. EC49020 Typical Charge Profile

Battery Charge Current Regulation

by the following equation:

The valid resistor range is 40k

Ω to 200kΩ (See Table 1.) Under high ambient temperature, the charge current will be

fold back to keep IC junction temperature not exceeding +125°C.

Table 1. Charge Current Settings

Charge Current (A)

50

2.0

66.7

1.5

100

1.0

200

0.5