Linear Technology LTC6804-1 - Page 14

LTC6804-1/LTC6804-2
14
680412fc
For more information www.linear.com/LTC6804-1
Typical perForMance characTerisTics
Drive and V
REG
Pin Power-Up V
REF1
Power-Up V
REF1
vs Temperature
Internal Die Temperature
Increase vs Discharge Current
isoSPI Current (READY)
vs Temperature
isoSPI Current (READY/ACTIVE)
vs isoSPI Clock Frequency
Discharge Switch On-Resistance
vs Cell Voltage Drive Pin Load Regulation Drive Pin Line Regulation
T
A
= 25°C, unless otherwise noted.
CELL VOLTAGE (V)
0
DISCHARGE SWITCH ON-RESISTANCE (Ω)
5
15
20
25
50
35
1
2
680412 G37
10
40
45
30
3
4 5
125°C
85°C
25°C
–45°C
ON-RESISTANCE OF INTERNAL
DISCHARGE SWITCH MEASURED
WITH 100Ω. EXTERNAL DISCHARGE
RESISTOR BETWEEN S(n) and C(n)
I
LOAD
(mA)
0.01
CHANGE IN DRIVE PIN VOLTAGE (mV)
–60
–40
1
680412 G38
–80
–100
0.1
0
–20
125°C
85°C
25°C
–45°C
V
+
= 39.6V
V
+
(V)
5 15
–15
CHANGE IN DRIVE PIN VOLTAGE (mV)
–5
10
25
45
55
680412 G39
–10
5
0
35
65
75
125°C
85°C
25°C
–45°C
4
5
6
680412 G40
3
2
100µs/DIV
1
0
–1
V
DRIVE
AND V
REG
(V)
V
DRIVE
V
REG
V
REG
: C
L
= 1µF
V
REG
GENERATED FROM
DRIVE PIN, FIGURE 28
V
REF1
(V)CSB
1.5
2.5
3.5
680412 G41
0.5
5
–5
1.0
2.0
3.0
CSB
0
1ms/DIV
V
REF1
C
L
= 1µF
TEMPERATURE (°C)
–50
3.145
V
REF1
(V)
3.146
3.148
3.149
3.150
3.155
3.152
0
50
75 100
680412 G42
3.147
3.153
3.154
3.151
–25
25
125
5 TYPICAL
INTERNAL DISCHARGE CURRENT (mA PER CELL)
0
0
INCREASE IN DIE TEMPERATURE (°C)
5
15
20
25
50
35
20
40
680412 G43
10
40
45
30
60
80
12 CELLS DISCHARGING
1 CELL
DISCHARGING
6 CELLS DISCHARGING
isoSPI CLOCK FREQUENCY (kHz)
0
10
12
14
800
680412 G45
8
6
200 400 600 1000
4
2
0
isoSPI CURRENT (mA)
WRITE
READ
LTC6804-1
LTC6804-2
ISOMD = V
REG
I
B
= 1mA
TEMPERATURE (°C)
–50 –25
4
isoSPI CURRENT (mA)
6
9
0
50
75
680412 G44
5
8
7
25
100
125
I
B
= 1mA
LT6804-1
ISOMD = V
REG
LT6804-2
ISOMD = V
REG
LT6804-1, ISOMD = 0