LTC4060_15 Datasheet, PDF (3/20 Pages) Linear Technology – Standalone Linear NiMH/NiCd Fast Battery Charger

LTC4060
ELECTRICAL CHARACTERISTICS The ● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V, V_BAT = 2.8V, GND = 0V unless otherwise specified. All
currents into the device pins are positive and all currents out of the device pins are negative. All voltages are referenced to GND
unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
V_UVI2 Undervoltage Lockout Exit Threshold
V_UVD2 Undervoltage Lockout Entry Threshold
V_UVI3 Undervoltage Lockout Exit Threshold
V_UVD3 Undervoltage Lockout Entry Threshold
V_UVH
Undervoltage Lockout Hysteresis
Charging Performance
SEL0 = 0, SEL1 = V_CC, V_CC Increasing ●
SEL0 = 0, SEL1 = V_CC, V_CC Decreasing ●
SEL0 = V_CC, SEL1 = V_CC, V_CC Increasing ●
SEL0 = V_CC, SEL1 = V_CC, V_CC Decreasing ●
For All SEL0, SEL1 Options
I_FCH
High Fast Charge Current (Notes 7, 10)
R_PROG = 698Ω, 5V < V_CC < 10V
●
I_FCL
Low Fast Charge Current (Note 7)
R_PROG = 3480Ω, 4.5V < V_CC < 10V
●
I_PCH
High Precharge Current (Note 7)
R_PROG = 698Ω, 4.5V < V_CC < 10V
I_PCL
Low Precharge Current (Note 7)
R_PROG = 3480Ω, 4.5V < V_CC < 10V
I_BRD
Battery Removal Detection Bias Current
4.5V < V_CC < 10V, V_BAT = V_CC – 0.4V
●
V_BR
Battery Removal Threshold Voltage (Note 8)
V_CELL Increasing, 4.5V < V_CC < 10V
●
V_BRH
Battery Removal Threshold Hysteresis Voltage
V_CELL Decreasing
(Note 8)
V_BOV
Battery Overvoltage Threshold (Note 8)
V_CELL Increasing, 4.5V < V_CC < 10V
●
V_BOVH Battery Overvoltage Threshold Hysteresis (Note 8) V_CELL Decreasing
V_FCQ
Fast Charge Qualification Threshold Voltage
(Note 8)
V_CELL Increasing, 4.5V < V_CC < 10V
V_FCQH
Fast Charge Qualification Threshold Hysteresis
Voltage (Note 8)
V_CELL Decreasing
V_IDT
V_IDTH
Initial Delay Hold-Off Threshold Voltage (Note 8) V_CELL Increasing, 4.5V < V_CC < 10V
Initial Delay Hold-Off Threshold Hysteresis Voltage V_CELL Decreasing
(Note 8)
V_MDV –∆V Termination (Note 8)
CHEM = V_CC (NiCd)
●
CHEM = 0V (NiMH)
●
V_PROG Program Pin Voltage
4.5V < V_CC < 10V, R_PROG = 635Ω
●
and 3480Ω
V_ART
Automatic Recharge Programmed Threshold
V_CELL Decreasing, V_ARCT = 1.1V,
●
Voltage Accuracy (Note 8)
4.5V < V_CC < 10V
V_ARDT Automatic Recharge Default Threshold Voltage V_CELL Decreasing, V_ARCT = V_CC,
●
Accuracy (Note 8)
4.5V < V_CC < 10V
V_ARH
Automatic Recharge Threshold Voltage Hysteresis V_CELL Increasing
(Note 8)
V_ARDEF Automatic Recharge Pin Default Enable Threshold
Voltage
V_ARDIS Automatic Recharge Pin Disable Threshold
Voltage
I_ARL
Automatic Recharge Pin Pull-Down Current
V_CLD
NTC Pin Cold Threshold Voltage
V_ARCT = 1.3V
●
V_NTC Decreasing, 4.5V < V_CC < 10V
●
V_CLDH NTC Pin Cold Threshold Hysteresis Voltage
V_NTC Increasing
V_HTI
NTC Pin Hot Charge Initiation Threshold Voltage V_NTC Decreasing, 4.5V < V_CC < 10V
●
MIN
6.67
6.57
8.28
8.18
1.9
0.35
320
40
–450
1.95
1.85
840
1.24
11
5
1.45
1.065
1.235
V_CC
– 0.8
250
0.15
0.83 •
V_CC
0.47 •
V_CC
TYP
6.81
6.71
8.47
8.37
100
2
0.4
400
80
–300
2.05
50
1.95
50
900
50
1.3
50
16
8
1.5
1.1
1.3
50
0.86 •
V_CC
150
0.5 •
V_CC
MAX UNITS
6.95
V
6.85
V
8.65
V
8.55
V
mV
2.1
A
0.45
A
480
mA
120
mA
–160
µA
2.15
V
mV
2.05
V
mV
960
mV
mV
1.36
V
mV
21
mV
14
mV
1.54
V
1.135
V
1.365
V
mV
V_CC
V
– 0.2
650
mV
1.5
µA
0.89 •
V
V_CC
mV
0.53 •
V
V_CC
4060f
3