Float Mode Chargers
for Sealed Lead Acid
Batteries
 Typical Uses of Float Chargers:

Regulated Current

REGULATED CURRENT float chargers have output current which is fixed during the charge cycle as shown in FIGURE 1. Output power available from 5W to 24W. Units have Inputs of 120V 60Hz, 230V 50 Hz or input selection 115/230V 50/60 Hz.

Impedance Limited

IMPEDANCE LIMITED float chargers have output current which varies during the charge cycle as shown in FIGURE 2. Output power available from 5W to 24W. Units have Inputs of 120V 60Hz, 230V 50 Hz or input selection 115/230V 50/60 Hz.

Switchmode Type

Switchmode technology Chargers using FLOAT MODE technique are available from 15W to 135W output power. All models have a wide range of Inputs (90-260 Vac 47-63 Hz). Charge Profile as in FIGURE 1.

FIGURE 1
Regulated Current

FIGURE 2
Impedance Limited

 Regulated Current Float Charger Diagram

Impedance Limited Float Charger Diagram 

Advantages of Regulated Current Chargers:

  • Current is fixed during the initial charge period.
  • Initial charge current does not vary due to AC line fluctuations or output voltage change.

Advantages of Impedance Limited Chargers:

  • Less costly than regulated current design.
  • Simpler design uses the impedance of the transformer and various series elements to limit the charge current.