* µ ** µ D1 MBRS13LT3 C2.47µF L1** 22µH D2 4148 2pF NOTE: COMPLETE LITHIUM-ION CHARGER, NO TERMINATION REQUIRED. R S4, R7 AND C1 ARE OPTIONAL FOR I IN LIMITING *TOKIN OR UNITED CHEMI-CON/MARCON CERAMIC SURFACE MOUNT **22µH SUMIDA CDRH125 SEE APPLICATIONS INFORMATION FOR INPUT CURRENT LIMIT AND UNDERVOLTAGE LOCKOUT SW CLN V CC BOOST COMP1 UV SPIN OVP SENSE R S3 2Ω 1% CLP PROG V C R S2 2Ω 1%.5Ω TERY CURRENT SENSE.33µF C IN * 15µF R3 39k.25% TERY VOLTAGE SENSE R4 162k.25% R7 5Ω C1 1µF 3Ω C PROG 1µF C OUT 22µF TANT D3 MBRS13LT3 R S4 ADAPTER CURRENT SENSE R PROG 4.93k 1% 4.2V 4.2V TO MAIN R5 SYSTEM POWER UNDERVOLTAGE LOCKOUT R6 5k 2 Li-Ion 1511 F1 V IN (ADAPTER INPUT) 11V TO 28V 1
** 1 ** 2 ** 3 SW 4 BOOST 5 UV 6 ** 7 ** 8 OVP 9 CLP 1 CLN 11 COMP1 12 SENSE 13 ** 14 TOP VIEW 28 ** 27 ** 26 ** 25 V CC1 * 24 V CC2 * 23 V CC3 * 22 ** 21 PROG 2 V C 19 UV OUT 18 COMP2 17 16 SPIN 15 ** GN PACKAGE 28-LEAD PLASTIC SSOP T JMAX = 125 C, θ JA = 35 C/ W** ORDER PART NUMBER CGN IGN * ** PARAMETER CONDITIONS MIN TYP MAX UNITS Overall Supply Current V PROG = 2.7V, V CC 2V 4.5 6.8 ma V PROG = 2.7V, 2V < V CC 25V 4.6 7. ma Sense Amplifier CA1 Gain and Input Offset Voltage 8V V CC 25V, V 2V (With R S2 = 2Ω, R S3 = 2Ω) R PROG = 4.93k 95 1 15 mv (Measured across )(Note 2) R PROG = 49.3k 8 1 12 mv T J < C 7 12 mv V CC = 28V, = 2V R PROG = 4.93k 9 11 mv R PROG = 49.3k 7 13 mv T J < C 6 14 mv V CC Undervoltage Lockout (Switch OFF) Threshold Measured at UV Pin 6 7 8 V UV Pin Input Current.2V V UV 8V.1 5 µa UV Output Voltage at UV OUT Pin In Undervoltage State, I UVOUT = 7µA.1.5 V UV Output Leakage Current at UV OUT Pin 8V V UV, V UVOUT = 5V.1 3 µa Reverse Current from Battery (When V CC Is 2V, V UV.4V 3 15 µa Not Connected, V SW Is Floating) 2
PARAMETER CONDITIONS MIN TYP MAX UNITS Overall Boost Pin Current V CC = 2V, V BOOST = V.1 1 µa V CC = 28V, V BOOST = V.25 2 µa 2V V BOOST V CC < 8V (Switch ON) 6 9 ma 8V V BOOST V CC 25V (Switch ON) 8 12 ma Switch Switch ON Resistance 8V V CC V MAX, I SW = 2A, V BOOST V SW 2V.15.25 Ω I BOOST / I SW During Switch ON V BOOST = 24V, I SW 2A 25 35 ma/a Switch OFF Leakage Current V SW = V, V CC 2V 2 1 µa 2V < V CC 28V 4 2 µa Minimum I PROG for Switch ON 2 4 2 µa Minimum I PROG for Switch OFF at V PROG 1V 1 2.4 ma Maximum for Switch ON V CC 2 V Current Sense Amplifier CA1 Inputs (Sense, ) Input Bias Current 5 125 µa Input Common Mode Low.25 V Input Common Mode High V CC 2 V SPIN Input Current 1 2 µa Reference Reference Voltage (Note 3) R PROG = 4.93k, Measured at OVP with VA Supplying I PROG and Switch OFF 2.448 2.465 2.477 V Reference Voltage All Conditions of V CC,T J C 2.441 2.489 V T J < C (Note 4) 2.43 2.489 V Oscillator Switching Frequency 18 2 22 khz Switching Frequency All Conditions of V CC,T J C 17 2 23 khz T J < C 16 23 khz Maximum Duty Cycle 85 % T A = 25 C 9 93 % Current Amplifier CA2 Transconductance V C = 1V, I VC = ±1µA 15 25 55 µmho Maximum V C for Switch OFF.6 V I VC Current (Out of Pin) V C.6V 1 µa V C <.45V 3 ma 3
PARAMETER CONDITIONS MIN TYP MAX UNITS Voltage Amplifier VA Transconductance (Note 3) Output Current from 5µA to 5µA.25.6 1.3 mho Output Source Current V OVP = V REF 1mV, V PROG = V REF 1mV 1.1 ma OVP Input Bias Current At.75mA VA Output Current ±3 ±1 na At.75mA VA Output Current, T J > 9 C 1 25 na Current Limit Amplifier CL1, 8V Input Common Mode Turn-On Threshold.75mA Output Current 93 1 17 mv Transconductance Output Current from 5µA to 5µA.5 1 2 mho CLP Input Current.75mA Output Current, V UV.4V.3 1 µa CLN Input Current.75mA Output Current V UV.4V.8 2 ma EFFICIENCY (%) 1 98 96 94 92 9 88 86 84 82 8.2 V IN = 16.5 = 8.4V CHARGER EFFICIENCY INCLUDES LOSS IN DIODE D3.6 1. 1.4 1.8 2.2 I (A) I CC (ma) 8 7 6 5 4 3 2 1 V CC = 16V C 25 C 125 C 1 2 3 4 5 6 7 DUTY CYCLE (%) 8 I CC (ma) 7. 6.5 6. 5.5 5. 4.5 MAXIMUM DUTY CYCLE C 25 C 125 C 5 1 15 2 V CC (V) 25 3 1769 G1 1769 G2 1769 G3 4
.3 4 V REF (V).2.1.1.2 ALL TEMPERATURES VOVP (mv) 3 2 1 125 C 25 C.3 5 1 15 2 V CC (V) 25 3.1.2.3.4.5.6.7.8.9 1. I VA (ma) 1769 G4 1769 G5 DUTY CYCLE (%) 98 97 96 95 94 93 92 91 9 2 4 6 8 1 12 14 TEMPERATURE ( C) 1769 G6 IVC (ma) 1.2 1.8.96.84.72.6.48.36.24.12.12.2.4.6.8 1. 1.2 1.4 1.6 1.8 2. V C (V) 1769 G7 6 2.47 2.468 IPROG (ma) 125 C 25 C REFERENCE VOLTAGE (V) 2.466 2.464 2.462 2.46 6 1 2 3 4 5 V PROG (V) 2.458 25 5 75 1 TEMPERATURE 125 15 1769 G8 1769 G9 5
µ µ 6 µ µ µ µ µ
UV UV OUT 6.7V 2kHz OSCILLATOR V SW.7V SHUTDOWN S V CC BOOST V CC 1.5V R R R Q SW PWM C1 SLOPE COMPENSATION B1 R2 V CC CA1 SW SPIN SENSE R S3 R S2 I R3 R1 1k I PROG VP V C 75k CA2 V REF VA g m =.64 Ω V REF 2.465V 1mV CLP CL1 CLN COMP1 COMP2 C PROG PROG I PROG R PROG I = (I PROG)(R S2 ) = 2.465V R ( S2 R PROG ( (R S3 = R S2 ) ) ) 1769 BD 7
V C.47µF 6k CA2 1k CA1 SPIN SENSE R S3 2Ω R S2 2Ω 1Ω V REF PROG 1µF 3Ω R PROG.65V 1k LT16 2k 1769 TC1 OVP VA PROG V REF I PROG 1k 1k.47µF R PROG 2.465V LT113 1769 TC2 8 µ
µ µ I RMS =.29 ( ) 1 (L1)(f) ( ) V CC µ µ µ µ µ µ R5 = R6(V IN V UV ) VUV 9
µµ CL1 1mV CLP CLN V CC UV 1µF R S4 * 5Ω *R S4 = 1mV ADAPTER CURRENT LIMIT AC ADAPTER OUTPUT R5 R6 1769 F2 V IN µ ( ) ( )( ) R I = I S2 PROG = 2.465V R PROG R S2 (I R S2 = R S3 = )(R PROG )( ) 2.465V (2A)(5k)(.5) = = 2Ω 2.465V 1
5V V PWM I = (DC)(2A) PROG 3Ω R PROG 4.7k Q1 VN2222 C PROG 1µF 1769 F3 µ µ µ ( )( = ) = R4 V 2.465 R3 2.465 = 39k ( ) 162k 8.4 2.465 2.465 µ µ OVP Q3 VN2222 R3 12k.25% R4 4.99k.25% R5 22k V IN 1769 F4 4.2V 4.2V 11
R1* 1.6k R2 56k.5Ω C1.1µF I D2 1N4148 R S3 2Ω R S2 2Ω ADAPTER OUTPUT SENSE D1 1N4148 3 8 7 LT111 2 4 1 3.3V OR 5V R4 47k NEGATIVE EDGE TO TIMER 2.465 2 2.465 2 R1 R2 ILOW IHI ILOW = ( )( ) = ( )( ) 12 R3 43k 3Ω PROG R1 49.3k 1µF Q1 R1(V * TRIP CURRENT = ) (R2 R3)( ) (1.6k)(8.4V) = 27mA (56k 43k)(.5Ω) R2 5.49k 1769 F5 1769 F4
PBIAS 3.5mA VIN 1.5mA V V 2 7.5mA.12 I VIN I V 2 V ( )( ) 1 3 PDRIVER = 55( VIN) PSW = ( )( ) ( ) ( ) ( )( ) I 2 RSW V VIN [ ] = ( ) ( )( ) ( )( )( )( ) tol VIN I f P 3.5mA 19 1.5mA 12.6 P P BIAS 12.6 19 DRIVER SW = ( )( ) ( ) 2 [ ] = ( ) ( )( ) 7.5mA.12 2mA.35W 2 ()( 2 12.6) 1 12. 6 3 = =.43W 55 19 2 ( ) 2.16 12.6 9 1 19 2 2kHz 19 =.42.8 =.5W = ()( )( ) ( )( )( ) V ( I )( V )( VX ) 1 X 3 P DRIVER = 55( VIN) P V X L1 I VX C2 D2 1µF SW BOOST SPIN 1769 F7 V 2A 126V 33V 1 33... 3 = 9. W 55 19V ( )( )( ) DRIVER = ( ) P V DRIVER X 9. W = = 28mA 33. V 13
45 STANDARD CONNECTION HIGH DUTY CYCLE CONNECTION THERMAL RESISTANCE ( C/W) 4 35 3 25 2 15 1 2-LAYER BOARD 4-LAYER BOARD MEASURED FROM AIR AMBIENT TO DIE USING COPPER LANDS AS SHOWN ON DATA SHEET 5 1 15 2 25 3 35 BOARD AREA (IN 2 ) 1769 F8 C3.47µF D2 SW BOOST SPIN SENSE C3.47µF D2 V X 3V TO 6V CX 1µF SW BOOST LT1679 SPIN SENSE 1769 F1 HIGH DUTY CYCLE CONNECTION LEAD TEMPERATURE ON PINS 1, 2, 3 ( C) 7 6 5 4 3 2 NOTE: PEAK DIE TEMPERATURE WILL BE ABOUT 15 C HIGHER AT 2A CHARGE CURRENT V IN = 19V = 12.3V V BOOST = 5V 2-LAYER BOARD ROOM TEMP = 24 C 5 IN 2 BOARD 25 IN 2 BOARD.5 1 1.5 CHARGE CURRENT (A) 2 1769 F9 V IN Q1 R X 5k Q1 = Si4435DY Q2 = TP61L Q2 D1 C2.47µF D2 V X 3V TO 6V CX 1µF SW V CC BOOST SPIN SENSE 1769 F11 14 µ
L1 L1 CLP CLN SW V CC PARASITIC INTERNAL DIODE SW CLP CLN V CC PARASITIC INTERNAL DIODE R7 5Ω C1 1µF C IN C1 1µF C IN R7 5Ω D3 R S4 D3 R S4 D4 ADAPTER IN TO SYSTEM POWER 1769 F12a ADAPTER IN TO SYSTEM POWER V IN C IN SWITCH NODE HIGH FREQUENCY CIRCULATING PATH D1 L1 C OUT 1769 F12b 1769 F13 15
D1 C IN SW V CC1 L1 TO TO C OUT NOTE: CONNECT ALL PINS TO EXPANDED PC LANDS FOR PROPER HEAT SINKING 1769 F14.75.98 (.191.249).15 ±.4 (.38 ±.1) 45 8 TYP.53.69 (1.351 1.748).4.9 (.12.249).386.393* (9.84 9.982) 28 27 26 25 24 23 22 21 2 19 18 17 1615.33 (.838) REF.16.5 (.46 1.27).8.12 (.23.35) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED.6" (.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED.1" (.254mm) PER SIDE.25 (.635) BSC.229.244 (5.817 6.198) 1 2 3 4 5 6 7 8 9 1 11 12 13 14.15.157** (3.81 3.988) GN28 (SSOP) 398 16 1769i 399.5K PRINTED IN JAPAN LINEAR TECHNOLOGY CORPORATION 1999