FP5139. Technology BOOST CONVERT CONTROL IC GENERAL DESCRIPTION FEATURES TYPICAL APPLICATION

Transcription

1 BOOST CONVERT CONTROL IC GENERAL DESCRIPTION The is a boost topology switching regulator control IC for battery-used applications field. The includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operating mode or standby mode. FEATURES Wide supply voltage operating range:.8 to 5V Reference voltage precision: 4% Low current consumption: Operation Mode 5.5mA Standby-by Mode µa High speed oscillator frequency: MHz max. Programmable Soft Start function (SS) Short Circuit Protection function(scp) Totem-pole output with adjustable on/off current (for NPN transistors or n-channel MOSFET) Logic level control stand-by mode function Package: SOP8/TSSOP8/MSOP8 SOP8 TYPICAL APPLICATION Digital Camera PDA Portable Equipment P/

2 FUNCTIONAL BLOCK DIAGRAM 3 7 Reference voltage supply 0.6V Sawtooth wave oscillator.5v 0.V 0.V V 36k Error Amp. 500 PWM Comp. DTC 0.6V Output drive control circuit 0.V 30k Soft start SCP 6 4 MARK VIEW PIN DESCRIPTION FP53 9 L Name No. I/O Description FB I Error amplifier inverting input pin SCP I Connected a capacitor Soft start and SCP function pin V CC 3 P IC power supply BR/CTL 4 I Output current setting and control pin OUT 5 O Totem-pole output GND 6 P IC ground OSC 7 I Capacitor and resistor connected for the frequency of oscillation COMP 8 O Error amplifier compensation output P/

3 ORDER INFORMATION Part Number Operating Temperature Package Description D-LF -0 C ~ +85 C SOP8 Tube DR-LF -0 C ~ +85 C SOP8 Tape & Reel W-LF -0 C ~ +85 C TSSOP8 Tube WR-LF -0 C ~ +85 C TSSOP8 Tape & Reel T-LF -0 C ~ +85 C MSOP8 Tube TR-LF -0 C ~ +85 C MSOP8 Tape & Reel IC DATE CODE DISTINGUISH L Lead Free Lot Number Mass Production Version Per Half Month Year FOR EXAMPLE: January A (Front Half Month), B (Last Half Month) February C, D March E, F And so on Lot Number is the last two numbers For Example: P3/

4 ABSOLUTE MAXIMUM RATINGS Power supply voltage V Output source current mA Output sink current mA Allowable dissipation SOP8 Ta mW MSOP8 Ta mW TSSOP8 Ta mW Operating temperature Storage temperature SOP8 Lead Temperature (soldering, 0 sec) TSSOP8 Lead Temperature (soldering, 0 sec) MSOP8 Lead Temperature (soldering, 0 sec) P4/

5 DC ELECTRICAL CHARACTERISTICS VCC=V,T A =5 Under Voltage Lock-Out section (U.V.L.O.) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Low threshold voltage V LOW V Upper threshold voltage V UPPER V Soft Start section (S.S.) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Input source current I SS V SCP = 0V A Soft start threshold voltage V SST V Short Circuit Protection section (S.C.P.) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Input source current I SCP V SCP = 0V A S.C.P. threshold voltage V SCP V Oscillator section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Oscillation frequency f R T =3.0KΩ,C T =70pF KHz Frequency change with voltage f / V V CC =V to 5V - 0 % Frequency change with temperature f / T Ta = 0to % Idle Period Adjustment section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Maximum duty cycle T DUTY R T =3.0kΩ, C T =70pF, % V FB =0.8V Total device section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Stand-by current I STANDBY Pin4 is open or V CC - - µa Average supply current I AVE R B =390Ω,V CC =0~5V ma P5/

6 DC ELECTRICAL CHARACTERISTICS (Cont.) Error Amplifier section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Input threshold voltage V FB V COMP =450mV mv V T change with voltage V FB / V V CC =V to 5V mv V T change with temperature V FB / T Ta = -0to % Input bias current I B µa Voltage Gain Av V/V Frequency bandwidth BW Av=0 db MHz Output voltage Positive V POS Swing Negative V NEG V Output source current I SOURCE µa V COMP =450mV Output sink current µa I SINK Output section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Output high voltage V OH R B =390Ω, I O =-5mA.0. - V Output high voltage V OH R B =750Ω, I O =-0mA, V V CC =.8V Output saturation voltage V OL R B =390Ω, I O =5mA V Output saturation voltage V OL R B =750Ω, I O =0mA, V V CC =.8V Output source current I OSOURCE R B =390Ω, Vo=0.9V ma Output sink current I OSINK R B =390Ω, Vo=0.3V ma Internal pull-down resistor R O kω Output Current Setting / Control section PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Pin voltage V BR R B =390Ω V Input off condition I OFF µa Input on condition I ON µa Pin current range I BR ma P6/

7 TYPICAL CHARACTERISTICS Vcc=V P7/

8 TYPICAL CHARACTERISTICS (Cont.) M 00 K 0 K TRIANGLE OSCILLATOR FREQUENCY VS TIMING RESISTANCE K K 4K 0K 40K 00K 400K M CT =00pF C T =000pF CT =0000pF Vcc=V Ta= P8/

9 DETAILED DESCRIPTION Voltage reference A.5V regulator operating from VCC is used to power the internal circuitry of the. An internal resistive divider provides 0.5V reference for the error amplifier, Soft-start (typ. 0.9V) and SCP (typ. 0.8V) circuits. Error amplifier The error amplifier compares a sample of the dc-dc converter output voltage to the 0.5V reference and generates an error signal for the PWM comparator. Output voltage of dc-dc converter is setting with the resistor divider using the following expression (see fig): VOUT R Vout = R R R Error Amplifier 36K 0.5V 500 C Figure. Error Amplifier with Feedback resistance divider Oscillator The oscillator frequency can be set between 0KHz and 500KHz by connecting a resistor and a capacitor at OSC pin of to ground. The oscillator frequency can be determined by using the graph shown in Figure 9. The oscillator output is a sawtooth wave with a minimum value of approximately 0.V and a maximum value of approximately 0.6V. The PWM comparator compares the oscillator voltage with error amplifier output voltage; internal DTC voltage (typ. 0.6V) and soft start setting voltage. When the sawtooth wave voltage is low than above three-output voltage, the output of is high (Turn on NPN transistor or NMOS). P9/

10 Under voltage lockout (UVLO) The under voltage lockout circuits turn the output off and whenever the supply voltage drops too low (approximately 0.9V at 5) for proper operation. A hysteresis voltage of 00mV eliminates false triggering on noise and chattering. Soft Start/ Short-circuit protection (S.S. / S.C.P.) The soft start is functional after power on, and the interval of soft start time is determined by a capacitor connected to SCP pin (pin ). When soft start function finished, the internal soft start voltage is setting high, but external SCP pin is setting low in order to change to short circuit detection / protection function. The time of soft start is following expression: [ F] Tss = C µ The short circuit protection is functional due to a heavy loading drop and output of error amplifier (COMP pin) is maintain a V POS (typ. 0.87V), the capacitor is charged until SCP threshold voltage (typ. 0.8V), then output is disable (internal pull-low) and the capacitor is discharged to low. The time of short circuit protection is following expression: [ F] Tscp = 0. 8 C µ P0/

11 Output transistor The has a totem-pole transistor with a 40mA source/sink current rating to drive an external NPN transistor or NMOS directly. The driving current capability depends on a resistor R that is connected to BR/CTL pin (Pin4) of. (see fig. 4) BR/CTL R Control R Q Figure 3. Output transistor driving control circuit BR/CTL pin can also use to control the output of for disable or enable function of system. Control Pin Q BR/CTL Pin Output Transistor Function Mode Low Off Open Disable Stand-by High On Bias Current Enable Operation P/

12 APPLICATION NOTE () Vin +.5V L 33uH SCD34 D Vout +9V/A IC R FB COMP R C7 0uF/5V C5 0.uF R4 k Q 3904 SCP VCC BR/CTL OSC GND OUT R5 3k C6 470pF C 0.07uF R3 0 3 Q 5k % C R6 3k % C8 0.uF C4 00uF/35V ON/OFF Socket Vin SW R7 4.7k Figure 4. DCV to DC4V Boost Regulator Vin +.5V ~ +6V L 0uH C9 SCD34 D Vout +3.3V IC 0u R FB COMP R C7 0uF/5V C5 0.uF R4 k Q 3904 SCP VCC BR/CTL OSC GND OUT R5 3k C6 470pF C 0.07uF R3 0 MOSFET N GDS 3 Q L 0uH C R6 k % 5.6k % C8 0.uF C4 00uF/35V ON/OFF Socket Vin R7 4.7k SW Figure 5. DC.5V~DC6V to DC3.3V SEPIC Regulator P/

13 3 3 3 R8 + APPLICATION NOTE () Vout C6 uf R3 R Q3 R7 R R R C5 uf C 0.uF D BAT54S/SOT_0 D C 0.uF 3 BAT54S/SOT_0 C3 uf Q NPN BEC R R R6 R D3 C4 uf R4 Q MOSFET P 3 R5 R Vout3 R8 R D4 TL43 TL43 3 C8 uf R9 Q4 Vin L 33uH D5 SCD34 L 33uH Vout C9 uf NPN R0 R IC FB COMP 8 R R Vot Socket Vout CON Vot Socket3 Vout3 Vin Socket Vin CON Vot Socket Vout C 0uF/6.3V C6 0.uF C7 0.uF 3 SCP VCC OSC GND BR/CTL OUT R4 k R6 3k Q6 NPN 3904 C7 470pF C0 0.uF R3 0 Q5 MOSFET N GDS C3 00uF 5k % C R5 3k % C4 0.uF C5 00uF CON3 CON4 ON/OFF Socket Vin R7 4.7k SW Figure 6. Charge Pump DC-DC Converter Circuits APPLICATION NOTE (3) R9 V 56K.8K FB R0 R V3 R 3.3K 33K 5.K (R9+R8)=7.48*R 0.66*(R8+R9)=(R0+R) D BAT54HT V L 33uH +5V + C8 C9 00uF/5V 47uF/6V VCC F L 8uH 4 T 6 D3 L3 33uH FUSE C 04 C 330uF + U R7 D6 8. C7 470pF D4 BAT54RCLT V3 + C0 00uF/6V L4 33uH +3.3V + C 47uF/6V C4 0.47uF SCP R5 0 CTL 8 FB COMP 7 SCP Cosc 3 6 VCC GND 4 5 CTL OUT COMP C5 0.uF R6 0 C6 3 3 Q3 AP304 CLS 0 BAT54RCLT V4 D5 BAT54HT C4 + C 00uF/6V L5 33uH -7.5V C5 + C3 47uF/6V ON / OFF R 33K C6 nf R 0K Q N3904 R4 C3 70pF R3 3K + 00uF/6V + 47uF/6V Figure 7. Flyback Multi-output DC-DC Converter Circuits P3/

14 TIMING WAVEFORM COMP pin Voltage Reference input for SCP Comparator Idle period setting voltage Oscillator waveform Soft-start setting voltage OUT pin waveform SS/SCP pin waveform Soft-start ts Output Short Circuit tpe Output Short Circuit Control pin voltage Short Circuit Protection IC Shutdown Figure 8. Timing Diagram P4/

15 PACKAGE OUTLINE SOP8 SYMBOLS MIN MAX A A D E H L NOTE:. JEDEC OUTLINE:MS-0 AA. DIMENSIONS D DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.MOLD FLASH,PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED.5mm (.0.06in) PER SIDE 3. DIMENSIONS E DOES NOT INCLUDE INTER-LEAD FLASH,OR PROTRUSIONS. INTER-LEAD FLASH AND PROTRUSIONS SHALL NOT EXCEED.5mm (.0.0in) PER SIDE. P5/

16 MSOP8 SYMBOLS MIN MAX A -.0 A A D 3.00 BSC E 4.90 BSC E 3.00 BSC L L 0.95 REF 0 8 NOTE:.JEDEC OUTLINE:MO-87 AA.DIMENSIONS D DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.MOLD FLASH,PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED 0.5 PER SIDE 3.DIMENSIONS E DOES NOT INCLUDE INTERLEAD FLASH,OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.5 PER SIDE. 4.DIMENSIONS 0. DOES NOT INCLUDE DAMBAR PROTRUSIONS.ALLOWABLE DAMBAR PROTRUSIONS SHALL BE 0.08 MM TOTAL IN EXCESS OF THE 0. DIMENSION AT MAXIMUM MATERIAL CONDITION.DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OF THE FOOT.MINIMIM SPAC BETWEEN PROTRUSION AND ADJACENT LEAD IS 0.07MM. 5.DIMENSIONS D AND E TO BE DETERMINED AT DATUM PLANE H P6/

17 TSSOP8 SYMBOLS MIN NOR MAX A A A D E 6.40 BSC E L NOTE:.JEDEC OUTLINE:MO-87 AA.DIMENSIONS D DOES NOT INCLUDE MOLD FLASH,PROTRUSIONS OR GATE BURRS.MOLD FLASH,PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.5 PER SIDE 3.DIMENSIONS E DOES NOT INCLUDE INTERLEAD FLASH,OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.5 PER SIDE. 4.DIMENSIONS 0. DOES NOT INCLUDE DAMBAR PROTRUSIONS.ALLOWABLE DAMBAR PROTRUSIONS SHALL BE 0.08 MM TOTAL IN EXCESS OF THE 0. DIMENSION AT MAXIMUM MATERIAL CONDITION.DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OF THE FOOT.MINIMIM SPAC BETWEEN PROTRUSION AND ADJACENT LEAD IS 0.07MM. 5.DIMENSIONS D AND E TO BE DETERMINED AT DATUM PLANE H P7/

18 PACKING SPECIFICATIONS BOX DIMENSION TUBE INSIDE BOX AND CARTON TAPE AND REEL INSIDE BOX AND CARTON PACKING QUANTITY SPECIFICATIONS SOP 8 MSOP8 TSSOP8 SOP 8 MSOP8 TSSOP EA/TUBE EA/TUBE EA/TUBE 500 EA / REEL 00 TUBES / INSIDE BOX 4 INSIDE BOXES / CARTON 4 INSIDE BOXES / CARTON LABEL SPECIFICATIONS Tapping & Reel Feeling Corp. Product Lot No A33C6 D/C 4Xx-XXL Q'ty Lead Free P8/

19 CARTON Feeling Corp. Product Type: Lot No: A33C6 Date Code: 4Xx-XXL Package Type: SOP-8L Marking Type: Laser Total Q'ty: 0,000 Lead Free CARRIER TAPE DIMENSIONS SOP8 APPLICATION W P E F D D SOP8 8.0±0..75±0. 5.5±0..55± APPLICATION Po P A D Bo Ko t SOP ±0. 6.4±0. 5.0±0..± P9/

20 REEL DIMENISIONS APPLICATION MATERIAL A B C D T T SOP8 PLASTIC REEL (WHILE) 330±0. 6± P0/

21 CARRIER TAPE DIMENSIONS MSOP8 APPLICATION W P E F D D MSOP ±.0 5.5± APPLICATION P 0 P A D B 0 K 0 t MSOP8 4.0±0..0± ±0.5 (mm) P/

22 REEL DIMENISIONS APPLICATION MATERIAL A B C D T T MSOP8 PLASTIC REEL (WHILE) 330± 6± P/

23 CARRIER TAPE DIMENSIONS TSSOP8 APPLICATION W P E F D D TSSOP ±.0 5.5± APPLICATION P 0 P A D B 0 K 0 t TSSOP ± ±0.5 (mm) P3/

24 REEL DIMENISIONS APPLICATION MATERIAL A B C D T TSSOP8 PLASTIC REEL (WHILE) P4/