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