LTC4011 Linear Technology, LTC4011 Datasheet - Page 9

• Manufacturer Part Number: LTC4011
• Description: High Efficiency Standalone Nickel Battery Charger
• Manufacturer: Linear Technology

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OPERATIO
4
U
NO DC ADAPTER
CHARGE**
TOP-OFF
NO BATTERY
V
(C/10)
CC
**OPTIONAL TEMPERATURE LIMITS APPLY
*t
< 4.25V
OR
MAX
IS PROGRAMMED MAXIMUM FAST CHARGE DURATION
t
MAX
Figure 1. LTC4011 State Diagram
/3
∆T/∆t
NiMH
V
CELL
> 900mV
FAST CHARGE**
QUALIFICATION
SHUTDOWN
AUTOMATIC
RECHARGE
BATTERY
CHARGE
CHECK
(1C)
DC ADAPTER PRESENT
V
CHARGER ENABLED AND
TEMPERATURE OK (OPTIONAL)
NiCd OR
NiMH – ∆V
CELL
> 350mV, ADEQUATE V
V
CELL
V
OR TIME = t
V
CELL
CELL
< 900mV
< 1.22V AT t
< 1.325V
MAX
CC
,
MAX
*/12
OR PWM FAULTS
PRECHARGE**
V
CELL
(C/5 FOR
t
MAX
FAULT
> 1.95V
/12)
V
CELL
4011 F01
< 900mV
LTC4011
9
4011p