ltc4058x-4.2 Linear Technology Corporation, ltc4058x-4.2 Datasheet - Page 6

• Manufacturer Part Number: ltc4058x-4.2
• Description: Ltc4058x-4.2 - Standalone Linear Li-ion Battery Chargers With Thermal Regulation In Dfn
• Manufacturer: Linear Technology Corporation

BLOCK DIAGRA
LTC4058-4.2/LTC4058X-4.2
the voltage on this pin can be used to measure the charge
current using the following formula:
This pin is clamped to approximately 2.4V. Driving this pin
to voltages beyond the clamp voltage can draw currents as
high as 1.5mA.
V
power to the charger. V
This pin should be bypassed with at least a 1 F capacitor.
When V
LTC4058 enters shutdown mode dropping the battery
drain current to less than 2 A.
PI FU CTIO S
6
CC
I
U
BAT
(Pin 6): Positive Input Supply Voltage. Provides
= (V
CC
U
is within 100mV of the BSENSE pin voltage, the
PROG
/R
7
3
8
PROG
ACPR
CHRG
EN
U
CC
) • 1000
R
W
EN
can range from 4.25V to 6.5V.
CHARGE
EN
LOGIC
TERM
SHDN
ACPR
120 C
T
DIE
2.9V
T
–
A
–
C2
CA
TO BAT
+
+
TRICKLE CHARGE
DISABLED ON THE
LTC4058X
C1
+
–
ACPR (Pin 7): Power Supply Status Open-Drain Output.
When V
old and at least 100mV above V
pulled to ground; otherwise, the pin is high impedance.
EN (Pin 8): Enable Input . A logic high on the EN pin will put
the LTC4058 into shutdown mode where the battery drain
current is reduced to less than 2 A and the supply current
is reduced to less than 50 A. A logic low or floating the EN
pin (allowing an internal 2M pull-down resistor to pull
this pin low) enables charging.
1
5
R
PROG
PROG
–
CC
MA
is greater than the undervoltage lockout thresh-
R3
1V
R4
0.1V
R5
+
6
V
CC
1.21V
REF
VA
5 A
+
–
GND
4, 9
R1
R2
405842 BD
BSENSE
BSENSE
1000
BAT
2
1
, the ACPR pin is
sn405842 405842fs