DC1701A - Demo Manual

QUICK START GUIDE FOR
LTC4098EUDC-3.6
DC1701A
LTC4098EUFD-3.6: USB
Compatible Switching Power Manager/Li-Ion
Charger with Overvoltage Protection
DESCRIPTION
Demonstration Circuit 1701A is a high efficiency USB
Power/Li-Ion battery manager plus a HV regulator battery tracking controller. The LTC4098EUDC-3.6 is
available in a 20-pin (3mm × 4mm × 0.75mm) QFN
surface mount package.
L, LTC, LTM, LT, Burst Mode, OPTI-LOOP, Over-The-Top and PolyPhase are registered
trademarks of Linear Technology Corporation. Adaptive Power, C-Load, DirectSense, Easy
Drive, FilterCAD, Hot Swap, LinearView, μModule, Micropower SwitcherCAD, Multimode
Dimming, No Latency ΔΣ, No Latency Delta-Sigma, No RSENSE, Operational Filter, PanelProtect,
PowerPath, PowerSOT, SmartStart, SoftSpan, Stage Shedding, SwitcherCAD, ThinSOT,
UltraFast and VLDO are trademarks of Linear Technology Corporation. Other product names
may be trademarks of the companies that manufacture the products.
PERFORMANCE SUMMARY Specifications are at TA = 25°C
SYMBOL
VBUS
VOUT
VBAT
IBAT
PARAMETER
Bus Input Voltage Range
Output Voltage Range
Output Float Voltage
Output Charge Current
CONDITIONS
Input disabled from 6V–30V
Range is mode and load dependant
Constant voltage mode
Constant current mode
QUICK START PROCEDURE
Using short twisted pair leads for any power
connections, with all loads and power supplies
off, refer to Figures 1 & 2 for the proper measurement and equipment setup.
A companion HV Buck demo board is required
for this check out procedure. The DC1394
(LT3480) board is recommended, and will be
used for the following procedure. Please refer
to the DC1394 Quick Start Guide for further
information.
Follow the procedure below:
1. Select input from VUSB: Set WALL jumper
(DC1394, JP3) to “5V ADAPTOR”. Ensure
that PS3 is off.
2. Set PS1 to 5V, and PS4 to 3.4V. Observe
VOUT (VM4), I(VUSB) (AM1),
V(CLPROG) (VM7) and V(PROG) (VM6).
The LTC4098EUDC-3.6 is being powered
from the USB input. The only load is the
battery charger at 1.2A, but D[2..0] = 0, so
1
MIN
4.35
3.5
TYP
3.6
1.25
MAX
5.5
5.5
1.5
UNITS
V
V
V
A
the input current limit is 100mA. Thus
VOUT ≈ 3.4V, I(VUSB) ≈ 100mA,
V(CLPROG) ≈ 1.2V, and V(PROG) ≈
0.08V.
3. Set D1 (JP2) to “1”. Observe VOUT
(VM4), I(VUSB) (AM1), V(CLPROG)
(VM7) and V(PROG) (VM6). D[2..0] now
equals 2, the input current limit is 500mA,
but the battery charge current is 1.2A,
which exceeds the input current limit.
Thus VOUT ≈ 3.5V, I(VUSB) ≈ 500mA,
V(CLPROG) ≈ 1.2V, and V(PROG) ≈ 0.4V.
4. Set D1 (JP2) to “0” and D0 (JP1) to “1”.
Observe VOUT (VM4), I(VUSB) (AM1),
V(CLPROG) (VM7) and V(PROG) (VM6).
D[2..0] now equals 1, the input current limit
is 1A. The charge current is till 1.2A, but
the VOUT regulator is a switching regulator so Pout = Pin * η, and so Iout is > 1.2A
for Iin = 1A. VOUT ≈ 3.9V, I(VUSB) ≈ 1A,
V(CLPROG) ≈ 1.2V, and V(PROG) ≈ 1V.
5. Set PS1 to 0V, and Ld1 to 0A. Observe
VOUT (VM4) and V(VOUT,BAT). There is
LTC4098EUDC-3.6
no voltage at VUSB so VOUT is powered
from V(BAT) via the ideal diode. Since the
load on VOUT is 0, VOUT = V(BAT) and
V(VOUT, BAT) is 0.
6. Set Ld1 to 1A. Observe VOUT (VM4) and
V(VOUT,BAT). Set Ld1 to 0A. VOUT is
still powered by V(BAT) via the ideal diode, but the load on VOUT is 1A. So,
V(VOUT,BAT) = 1A * Rds(on) of the ideal
diode. V(VOUT,BAT) ≈ 200mV.
7. Set PS1 to 5V. Set NTC (JP4) to “EXT”.
Does the “Battery Charging” LED blink?
Set NTC (JP4) to “INT”. The NTC voltage
goes to 5V indicating a battery pack that
is too cold. The charger indicates a fault
by blinking the “Battery Charging” LED.
8. Set WALL (DC1394, JP3) to “HVBUCK”.
Increase PS2 from 0V to 8V. Observe
VOUT (VM4) and V(PROG) (VM6). The
LT3480 is now supplying power to VOUT.
Even though VUSB is available, the presence of voltage on the WALL pin of the
LTC4098-3.6 has shut off the VOUT regulator. The Vc pin of the LTC4098-3.6 is
setting the output voltage of the LT3480.
VOUT ≈ 3.9V, and V(PROG) ≈ 1V.
9. Set Ld1 to 1A. Observe VOUT (VM4) and
V(PROG) (VM6). In this case the LT3480
is supplying both the battery charger and
the external load on VOUT. VOUT ≈ 3.9V,
and V(PROG) ≈ 1V.
10. Set PS2 to 38V. Observe VOUT (VM4)
and V(PROG) (VM6).
11. Set Ld1 to 0A. Observe VOUT (VM4) and
V(PROG) (VM6).
12. Set WALL (DC1394, JP3) to “5V
ADAPTOR” and PS3 to 5V. Observe
VOUT (VM4) and V(PROG) (VM6). VOUT
is being powered by a wall adaptor at 5V.
The WALL still shuts the VOUT regulator
off, but the Vc pin cannot control the VOUT
voltage. VOUT ≈ 5V, V(PROG) ≈ 1V.
13. Set Ld1 to 1A. Observe VOUT (VM4) and
V(PROG) (VM6). Set Ld1 to 0A.
2
14. Set D2 (JP3) to “1”. Does “BATTERY
CHARGING” LED go out? Setting D2 = 1
shuts off the Battery charger.
LTC4098EUDC-3.6
-
+
PS2
+
0V-40V supply
1A
-
VM2
-
+
PS3
+
0V-6V supply
2A
-
+
AM2
+
AM3
VM3
-
D2
D1
D0
AM4
-
+
+
+
VM4
-
-
Ld1
0V-5V
5A
AM1
+
-
AM5
+
PS1
+
0V-6V supply
2A
-
-
+
+
VM1
-
VM5
-
3.6Ω
+
-
VM6
-
+
VM7
+
-
Note: All connections from equipment should be Kelvin connected directly to the Board PINS which they are connected to on this diagram and any input, or output, leads should be twisted pair
Figure 1. Proper Measurement Equipment Setup for DC1701A
GND
VIN
Figure 2. Measuring Input or Output Ripple
3
PS4
0V-5V supply
2A
E1
Figure 3: DC1701A Schematic
E3
E6
E5
CLPROG
PROG
NTC
E4
NTCBIAS
GND
E2
5
4 TP3
3 TP2
2 TP1
1
VOUT
MINI-B USB
GND
ID
D+
D-
VUSB
J1
1
JP3
D2
1
JP2
D1
1
JP1
D0
ID
DD+
4.35V - 5.5V, Non-operating Fault
Tolerance to 30V Continous, 36V
Transient.
VUSB
0
0
0
R1
1.0
5%
6.3V
C1
10uF
0603
20%
R4
806
C3
0.1uF
16V
0603
R2
6.04k
1
R5
3.01k
HPWR
JP5
TP4
OVGATE
3
2
R7
100k
R6
0
1A
R14
4.22k
INT
EXT
1.5A
JP4
NTC
R3
100k
Leakage current
must be < 400nA
Q1
Si2306BDS
1
1
C2
22uF
0805
20%
6.3V
3
7
17
16
15
5
4
1
NTC
CLPROG
PROG
D2
D1
13
VBUS
VC
WALL
ACPR
21
VOUT
SW
L1
3.3uH
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
VOUT
GEORGE B.
SCALE = NONE
NC
PCB DES.
APP ENG.
APPROVALS
R8
0
Leakage currrent must be < 50nA
Unless noted:
Resistors: Ohms, 0402, 1%, 1/16W
Capacitors: uF, 0402, 10%, 50V
11
6
8
10
12
14
18
19
20
OFF
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
9
BAT
BATSENS
CHRG
IDGATE
GNDGND
NTCBIAS
D0
3.75mA
2.5mA (SUSP)
OFF
OFF
OFF
ON
OFF
ON
ON
XFL4020-332MEC
Footprint can mount XFL or XPL
1.5A
750mA
1A (10X)
500mA (5X)
LTC4098EUDC-3.6
OVSENS
OVGATE
U1
750µA
150mA
750mA
150mA
1.5A
500uA (SUSP)
100mA (1X)
500mA (5X)
100mA (1X)
1A (10X)
Not USB Compliant
1
0
1
0
1
1
1
1
0
1
0
1
1
0
0
0
1
0
0
0
0
0
* Note:
2
INPUT CURRENT LIMIT SETTINGS
R9
1.0
5%
1
TP7
R11
1.0
5%
C4
100uF
20%
6.3V
1206
Q2
Si2333DS
TP6
TP5
J3
BAT
GND
NTC
J2
E7
GND
E8
BAT
VFLOAT = 3.6V
1.25A
BATSENS
DF3-3P-2DSA
OPT
1
2
3
GND
CHRG
E9
E10
E11
VOUT
3.0V - 4.2V
2A
E12
HV BUCK
INTERFACE
DA TE
05-06-10
DATE:
N/A
SIZE
LTC4098EUDC-3.6
DEMO CIRCUIT 1701A
Friday, June 25, 2010
IC NO.
SHEET
1
OF
1
1
REV.
USB COMPATIBLE SWITCHING POWER
MANAGER / LI-ION CHARGER WITH OVERVOLTAGE PROTECTION
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
R12
0
R13
1k
5%
0603
VOUT
VC/TRACK
VOUT
GND
ACPR
GND
PG
WALL
SY NC
SHDN
DVCC
ILIM
SDA
HVOK/INIT
SCL
HVIN
GEORGE B.
A PPROVED
SQT-108-01-F-D-RA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D1
BATTERY
CHARGING
Green
PRODUCTION FAB
DESC RIPTION
REVISION HISTORY
TECHNOLOGY
R10
1.0
5%
1
REV
TITLE: SCHEMATIC
TP8
C5
22uF
0805
20%
6.3V
EC O
2
3
4
Input Limit Current Input Limit Current CHARGER
D2 D1 D0 JP5 (HPWR) = 1A
JP5 (HPWR) = 1.5A* STATUS
LTC4098EUDC-3.6
LTC4098EUDC-3.6
Figure 4. DC1701A BOM
5
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