LTC4010CFEPBF LINER [Linear Technology], LTC4010CFEPBF Datasheet - Page 9

• Manufacturer Part Number: LTC4010CFEPBF
• Description: High Efficiency Standalone Nickel Battery Charger
• Manufacturer: LINER [Linear Technology]

block DiagraM
operaTion
(Refer to Figure 1)
1
2
4
3
5
6
8
7
GND
CHEM
V
V
TIMER
NO DC ADAPTER
V
FAULT
CHRG
TEMP
CELL
CDIV
CHARGE**
TOP-OFF
NO BATTERY
(C/10)
V
CC
**OPTIONAL TEMPERATURE LIMITS APPLY
*t
< 4.25V
MAX
OR
IS PROGRAMMED MAXIMUM FAST CHARGE DURATION
t
MAX
THERMISTOR
CONVERTER
REFERENCE
INTERFACE
DETECTOR
BATTERY
VOLTAGE
/3
CHARGE
TIMER
A/D
NiMH
∆T/∆t
V
CELL
Figure 1. LTC4010 State Diagram
> 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
CHARGER
CONTROL
> 350mV, ADEQUATE V
STATE
LOGIC
V
CELL
V
OR TIME = t
V
CELL
CELL
< 900mV
< 1.22V AT t
< 1.325V
MAX
CC
REGULATOR
REGULATOR
SHUTDOWN
,
UVLO AND
MAX
INTERNAL
VOLTAGE
VOLTAGE
PWM
*/12
OR PWM FAULTS
PRECHARGE**
V
CELL
(C/5 FOR
t
MAX
FAULT
4010 BD
> 1.95V
/12)
V
CELL
INTV
READY
TGATE
BGATE
4010 F01
SENSE
PGND
< 900mV
DD
BAT
V
CC
16
15
14
12
13
10
11
9
LTC4010
4010fb