LTC4000_15 Datasheet, PDF (5/40 Pages) Linear Technology – High Voltage High Current Controller for Battery Charging and Power Management

LTC4000
Electrical Characteristics The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = V_CLN = 3V to 60V unless otherwise noted (Notes 2, 3).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Battery PowerPath Control
Battery Discharge PowerPath Forward
Regulation Voltage
V_BAT,CSN, 2.8V ≤ V_BAT ≤ 60V
l 0.1
8
20
mV
Battery PowerPath Fast Reverse Turn-Off
V_BAT,CSN, 2.8V ≤ V_BAT ≤ 60V, Not
l –90
–50
–20
mV
Threshold Voltage
Charging, V_BGATE = V_CSN – 2.5V,
∆I_BGATE/∆V_BAT,CSN ≥ 100μA/mV
Battery PowerPath Fast Forward Turn-On
Threshold Voltage
V_BAT,CSN, 2.8V ≤ V_CSN ≤ 60V,
V_BGATE = V_BAT – 1.5V,
∆I_BGATE/∆ V_BAT,CSN ≥ 100μA/mV
l 40
80
130
mV
Battery Gate Turn-Off Current
V_BGATE = V_CSN – 1.5V, V_CSN ≥ V_BAT,
V_OFB < V_{OUT(INST_ON)} and Charging
in Progress, or V_CSN = V_BAT and Not
Charging
–0.3
μA
Battery Gate Turn-On Current
I_{BGATE(FASTOFF)}
I_{BGATE(FASTON)}
V_BGATE(ON)
Battery Gate Fast Turn-Off Current
Battery Gate Fast Turn-On Current
Battery Gate Clamp Voltage
Battery Gate Off Voltage
BIAS Regulator Output and Control Pins
V_BGATE = V_BAT – 1.5V, V_CSN ≥ V_BAT,
V_OFB > V_{OUT(INST_ON)} and Charging in
Progress, or V_CSN = V_BAT – 20mV
V_CSN = V_BAT + 0.1V and Not
Charging, V_BGATE = V_CSN – 3V
V_CSN = V_BAT – 0.2V,
V_BGATE = V_BAT – 1.5V
I_BGATE = 2μA, V_BAT = 12V to 60V,
l
V_CSN = V_BAT – 0.5V, Measure
V_BAT – V_BGATE
I_BGATE = – 2μA, V_BAT = 2.8V to 60V, l
V_CSN = V_BAT + 0.5V and not Charging,
Measure V_CSN – V_BGATE
0.3
μA
–0.5
mA
0.7
mA
13
15
V
0.45
0.7
V
V_BIAS
ΔV_BIAS
BIAS Output Voltage
BIAS Output Voltage Load Regulation
BIAS Output Short-Circuit Current
Transconductance of Error Amp
No Load
I_BIAS = – 0.5mA
V_BIAS = 0V
CC = 1V
l 2.4
2.9
3.5
V
–0.5
–10
%
–12
mA
0.5
mA/V
Open Loop DC Voltage Gain of Error Amp
CC = Open
80
dB
I_{ITH(PULL_UP)}
I_{ITH(PULL_DOWN)}
Pull-Up Current on the ITH Pin
Pull-Down Current on the ITH Pin
Open Loop DC Voltage Gain of ITH Driver
V_ITH = 0V, CC = 0V
V_ITH = 0.4V, CC = Open
ITH = Open
–6
–5
–4
μA
l 0.5
1
mA
60
dB
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4000 is tested under conditions such that T_J ≈ T_A. The
LTC4000E is guaranteed to meet specifications from 0°C to 85°C junction
temperature. Specifications over the –40°C to 125°C operating junction
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC4000I is guaranteed over the
full –40°C to 125°C operating junction temperature range. Note that the
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors. The junction temperature (T_J, in °C) is calculated from the ambient
temperature (T_A, in °C) and power dissipation (P_D, in Watts) according to
the following formula:
T_J = T_A + (P_D • θ_JA), where θ_JA (in °C/W) is the package thermal
impedance.
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4: These parameters are guaranteed by design and are not 100%
tested.
For more information www.linear.com/LTC4000
4000fb
5