LT1769 Linear Technology, LT1769 Datasheet - Page 2

• Manufacturer Part Number: LT1769
• Description: Constant-Current/ Constant-Voltage 2A Battery Charger with Input Current Limiting
• Manufacturer: Linear Technology

ABSOLUTE
LT1769
(Note 1)
Supply Voltage
BOOST Pin Voltage with Respect to V
I
Operating Junction Temperature Range
Operating Ambient Temperature
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
V
PARAMETER
Overall
Supply Current
Sense Amplifier CA1 Gain and Input Offset Voltage
(With R
(Measured across R
V
UV Pin Input Current
UV Output Voltage at UV
UV Output Leakage Current at UV
Reverse Current from Battery (When V
Not Connected, V
2
BAT
CC
CLN
(V
Commercial ........................................... 0 C to 125 C
Industrial ......................................... – 40 C to 125 C
Commercial ............................................ 0 C to 70 C
Industrial ........................................... – 40 C to 85 C
Undervoltage Lockout (Switch OFF) Threshold
= V
(Average)........................................................... 2A
CC
S2
, CLP and CLN Pin Voltage) ......................... 30V
CC
= 200 , R
. No load on any outputs unless otherwise noted.
SW
S1
S3
Is Floating)
)(Note 2)
= 200 )
W
MAXIMUM
OUT
Pin
OUT
W W
Pin
CC
Is
RATINGS
CC
................. 25V
CONDITIONS
V
V
8V V
V
Measured at UV Pin
0.2V V
In Undervoltage State, I
8V V
V
U
PROG
PROG
CC
BAT
A
R
R
T
R
R
T
= 28V, V
A
A
PROG
PROG
PROG
PROG
= 25 C. V
< 0 C
< 0 C
= 2.7V, V
= 2.7V, 20V < V
CC
UV
20V, V
UV
, V
= 4.93k
= 49.3k
= 4.93k
= 49.3k
The
25V , 0V V
UVOUT
BAT
8V
UV
CC
CC
= 20V
denotes specifications which apply over the full operating
= 5V
0.4V
= 16V, V
20V
CC
PACKAGE/ORDER
Consult factory for Military grade parts.
UVOUT
BAT
25V
BAT
COMP1
= 70 A
GND**
GND**
GND**
BOOST
GND**
GND**
GND**
20V
SENSE
OVP
CLP
CLN
SW
= 8V, R
UV
T
JMAX
28-LEAD PLASTIC SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125 C,
S2
GN PACKAGE
TOP VIEW
= R
JA
S3
= 35 C/ W**
= 200 (see Block Diagram),
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MIN
GND**
GND**
GND**
V
V
V
GND**
PROG
V
UV
COMP2
BAT
SPIN
GND**
93
90
8
7
6
7
6
CC1
CC2
CC3
C
OUT
*
*
*
INFORMATION
U
TYP
100
4.5
4.6
0.1
0.1
0.1
10
7
3
** ALL GND PINS ARE
*ALL V
BE CONNECTED
TOGETHER CLOSE TO
THE PINS
FUSED TO INTERNAL DIE
ATTACH PADDLE FOR
HEAT SINKING. CONNECT
THESE PINS TO
EXPANDED PC LANDS
FOR PROPER HEAT
SINKING. 35 C/W
THERMAL RESISTANCE
ASSUMES AN INTERNAL
GROUND PLANE
DOUBLING AS A HEAT
SPREADER
ORDER PART
LT1769CGN
LT1769IGN
W
NUMBER
MAX
CC
107
110
6.8
7.0
0.5
12
12
14
13
15
8
5
3
PINS SHOULD
UNITS
U
mA
mA
mV
mV
mV
mV
mV
mV
V
A
V
A
A