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PDF LTC4090 Data sheet ( Hoja de datos )
| Número de pieza | LTC4090 | |
| Descripción | USB Power Manager | |
| Fabricantes | Linear Technology Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC4090 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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FEATURES
n Seamless Transition Between Power Sources:
Li-Ion Battery, USB, and 6V to 36V Supply (60V Max)
n 2A Output High Voltage Buck Regulator with
Bat-Track™ Adaptive Output Control (LTC4090)
n Internal 215mW Ideal Diode Plus Optional
External Ideal Diode Controller Provides Low Loss
PowerPath™ When External Supply/ USB Not Present
n Load Dependent Charging from USB Input
Guarantees Current Compliance
n Full Featured Li-Ion Battery Charger
n 1.5A Maximum Charge Current with Thermal Limiting
n NTC Thermistor Input for Temperature Qualified
Charging
n Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package
APPLICATIONS
n HDD-Based Media Players
n Personal Navigation Devices
n Other USB-Based Handheld Products
n Automotive Accessories
LTC4090/LTC4090-5
USB Power Manager with
2A High Voltage Bat-Track
Buck Regulator
DESCRIPTION
The LTC®4090/LTC4090-5 are USB power managers plus
high voltage Li-Ion/Polymer battery chargers. The devices
control the total current used by the USB peripheral for
operation and battery charging. Battery charge current
is automatically reduced such that the sum of the load
current and the charge current does not exceed the pro-
grammed input current limit. The LTC4090/LTC4090-5
also accommodate high voltage power supplies, such as
12V AC/DC wall adapters, Firewire, or automotive power.
The LTC4090 provides a Bat-Track adaptive output that
tracks the battery voltage for high efficiency charging from
the high voltage input. The LTC4090-5 provides a fixed 5V
output from the high voltage input to charge single-cell
Li-Ion batteries. The charge current is programmable and an
end-of-charge status output (CHRG) indicates full charge.
Also featured are programmable total charge time, an NTC
thermistor input used to monitor battery temperature while
charging and automatic recharging of the battery.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and Bat-Track, PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners.
TYPICAL APPLICATION
HIGH (7.5V-36V)
VOLTAGE INPUT
5V WALL
ADAPTER
USB
59k
270pF
HVIN
1µF
IN
4.7µF
VC
TIMER
BOOST
LTC4090
0.47µF
SW
HVOUT
HVPR
OUT
BAT
6.8µH
22µF
1k
LOAD
4.7µF
0.1µF
RT CLPROG
40.2k
2k
GND PROG
100k +
Li-Ion BATTERY
VOUT (TYP)
VBAT + 0.3V
5V
5V
VBAT
AVAILABLE INPUT
HV INPUT (LTC4090)
HV INPUT (LTC4090-5)
USB ONLY
BAT ONLY
4090 TAO1
For more information www.linear.com/LTC4090
LTC4090/LTC4090-5 High Voltage
Battery Charger Efficiency
90 FIGURE 12 SCHEMATIC
80
WITH RPROG = 52k
NO OUTPUT LOAD
LTC4090
70
LTC4090-5
60
50
40
HVIN = 8V
30
HVIN = 12V
HVIN = 24V
HVIN = 36V
20
2.0 2.5 3.0 3.5 4.0 4.5
VBAT (V)
4090 TA01b
4090fd
1
1 page  
LTC4090/LTC4090-5
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at
RPROG = 100k, RCLPROG = 2k and SUSP = 0V, unless
ToAth=er2w5i°sCe.
HVIN =
noted.
HVEN
=
12V,
BOOST
=
17V,
VIN
=
HPWR
=
5V,
VBAT
=
3.7V,
SYMBOL
NTC
IVNTC
VVNTC
INTC
VCOLD
VHOT
VDIS
PARAMETER
VNTC Pin Current
VNTC Bias Voltage
NTC Input Leakage Current
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Threshold Voltage
CONDITIONS
VNTC = 2.5V
IVNTC = 500µA
NTC = 1V
Rising NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
MIN TYP
MAX UNITS
l 1.4
l 4.4
l 75
2.5
4.85
0
0.738 • VNTC
0.02 • VNTC
0.29 • VNTC
0.01 • VNTC
100
35
3.5
±1
125
mA
V
µA
V
V
V
V
mV
mV
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 LTC4090/LTC4090-5 are guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
Note 4: VCC is the greater of VIN, VOUT, and VBAT
Note 5: Guaranteed by long term current density limitations.
Note 6: Total input current is equal to this specification plus 1.002 • IBAT
where IBAT is the charge current.
Note 7: Accuracy of programmed current may degrade for currents
greater than 1.5A.
Note 8: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 9: Absolute Maximum Voltage at HVIN and HVEN pins is for
nonrepetitive 1 second transients; 40V for continuous operation.
TYPICAL PERFORMANCE CHARACTERISTICS
VFLOAT Load Regulation
4.30 RPROG = 34k
4.25
4.20
4.15
4.10
4.05
4.00
0 200 400 600 800 1000
IBAT (mA)
4090 G01
Battery Regulation (Float)
Voltage vs Temperature
4.220 VIN = 5V
4.215 IBAT = 2mA
4.210
4.205
4.200
4.195
4.190
4.185
4.180
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
4090 G02
For more information www.linear.com/LTC4090
Battery Current and Voltage
vs Time (LTC4090)
5
1500
4
VBAT
1200
VOUT
3
VCHRGB
IBAT
900
2 C/10 600
1250mAh
1 CELL
HVIN = 12V
RPROG = 50k
0
0 50
TERMINATION 300
100 150
TIME (MIN)
0
200
4090 G03
4090fd
5
5 Page 
BLOCK DIAGRAM
LTC4090/LTC4090-5
HVIN
10
10 HVEN
RT1
RC
CC
10 RT
SYNC
10
10 VC
CF
INTERNAL
REFERENCE
SOFT-START
VC CLAMP
PG
10
RCLPROG
10 IN
IIN 1V +
1000
CLPROG
22
CL
–
HPWR 500mA/100mA
13
2µA
BOOST
+
IL
–
OSCILLATOR
200kHz - 2.4MHz
+
–
–
GM+
+
RQ
SQ
VSET
3.6V (LTC4090)
5V (LTC4090-5)
DRIVER
–
+–
350mV
(LTC4090)
+–
75mV (RISING)
25mV (FALLING)
+
–
+ 2.8V
+
CURRENT
CONTROL
SOFT-START
ILIM
DIE
TEMP 105°C
CURRENT LIMIT
IN ILIM CNTL
ENABLE
–+
TA
IN OUT BAT
4.25V (RISING)
3.15V (FALLING)
–
OUT
CC/CV REGULATOR
CHARGER
ENABLE
30mV
IDEAL
DIODE
BAT
C2
Q1 SW L1
D1
HVOUT
C1
HVPR
19
20mV –
+ EDA
OUT 21
GATE
21
BAT
21
RPROG
PROG
23
15 VNTC
10k
NTC
14
10k T
+
CHG
–
1V
– TOO
COLD
+
– TOO
HOT
+
CHARGE CONTROL
ICHG
SOFT-START2
VOLTAGE DETECT
UVLO
NTCERR
CONTROL LOGIC
BAT UV
RECHRG
HOLD
RESET
+
– 0.25V
+
2.9V
BATTERY
UVLO
–
+
4.1V
RECHARGE
–
OSCILLATOR
CLK
COUNTER
STOP
TIMER
21
CHRG 18
CTIMER
+
0.1V –
NTC ENABLE
GND
16
2µA
SUSP
11
EOC
C/10
4090 BD
For more information www.linear.com/LTC4090
4090fd
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC4090.PDF ] | |
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