Asynchronous Boost Controller - Feeling Tech · 2012. 3. 14. · FP5139 Asynchronous Boost Controller This datasheet contains new product information. Feeling Technology reserves

FP5139 Asynchronous Boost Controller

This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 1.2

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General Description

The FP5139 is a boost topology switching regulator control IC for battery-powered applications.

The FP5139 includes a totem-pole single output stage for driving NPN transistor or N-MOS, high

precision reference voltage(0.5V) to compare output voltage with feedback amplifier, an internal duty

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: 1.8 to 15V

Precision Reference Voltage: 0.5V ±2%

Low Current Consumption: 5.5mA in Operation Mode

Low Current Consumption: 1μA in Standby Mode

High Oscillator Frequency: 1MHz max.

Totem-Pole Output with Adjustable ON / OFF Current (for NPN Transistors or n-Channel MOSFET)

Logic Level Control Stand-by Mode Function

Programmable Soft Start Function (SS)

Short Circuit Protection Function (SCP)

Package: TSSOP-8L

Applications Digital Camera

PDA

Portable Equipment

FP5139


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Function Block Diagram

-

+

-

+++

Soft Start SCP

Referencevoltage supply

Sawtooth waveoscillator

Output drivecontrol circuit

0.1V

0.5VError Amp.

500

36k

0.6V

1.25V

DTC 0.6V

PWMComp.

0.1V

30k

0.22V

VCC

GND SCP BR /CTL

OSC

OUT

FB

COMP

FP5139


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Pin Descriptions TSSOP-8L

Marking Information TSSOP-8L

9Fa-86LHalogen FreeLot Number

Per-Half MonthYear

FP5139

Internal ID

Name No. I / O Description FB 1 I Error Amplifier Inverting Input

SCP 2 I Soft Start and SCP Function Connect a Capacitor to this pin VCC 3 P IC power supply

BR / CTL 4 I Output Current Setting and Control

OUT 5 O Totem-Pole Output

GND 6 P IC Ground

OSC 7 I Oscillator Output: Connect Capacitor and Resistor to this pin for Frequency AdjustmentCOMP 8 O Error Amplifier Compensation Output

Halogen Free: Halogen free product indicator

Lot Number: Wafer lot number’s last two digits

For Example: 132386TB 86 Internal ID: Internal Identification Code

Per-Half Month: Production period indicated in half month time unit For Example: January → A (Front Half Month), B (Last Half Month)

February → C (Front Half Month), D (Last Half Month)

Year: Production year’s last digit

FP5139


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Ordering Information Part Number Operating Temperature Package MOQ Description

FP5139BWR-LF -10°C ~ +85°C TSSOP-8L 2500EA Tape & Reel Absolute Maximum Ratings

Parameter Symbol Conditions Min. Typ. Max. Unit Power Supply Voltage VIN 15 V

Output Source Current -50 mA

Output Sink Current 50 mA

Allowable Power Dissipation

SOP-8L, TA +25≦ ℃ 570 mW

MSOP-8L, TA +25≦ ℃ 400 mW

TTSOP-8L, TA +25≦ ℃ 400 mW

Storage Temperature -55 +125 ℃

Lead Temperature

SOP-8L, (soldering, 10 sec) +260 ℃

TSSOP-8L, (soldering, 10 sec) +260 ℃

MSOP-8L, (soldering, 10 sec) +260 ℃

Suggested IR Re-flow Soldering Curve

FP5139


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Recommended Operating Conditions Parameter Symbol Conditions Min. Typ. Max. Unit

Supply Voltage 1.8 15 V

Operating Temperature -10 +85 ℃ DC Electrical Characteristics (VCC= +2V, TA=25℃, unless otherwise noted)

Parameter Symbol Test Conditions Min. Typ. Max. Unit Under Voltage Lock-Out Section (UVLO)

Low Threshold Voltage VLOW 0.9 V

Upper Threshold Voltage VUPPER 1.1 1.3 1.5 V

Soft Start Section (SS)

Input Source Current ISS VSCP= 0V -1.5 -1.0 -0.7 µA Soft Start Threshold Voltage VSST 0.8 0.9 1.0 V

Short Circuit Protection Section (SCP) Input Source Current ISCP VSCP= 0V -1.5 -1.0 -0.7 μA SCP Threshold Voltage VSCP 0.7 0.8 0.9 V

Oscillator Section Oscillation Frequency f RT =3.0KΩ, CT =270pF 400 500 600 KHz

Frequency Change With Voltage Δf / ΔV VCC =2V to 15V 2 10 % Frequency Change With Temperature Δf / ΔT TA = 0℃ to 85℃ 5 %

Idle Period Adjustment Section

Maximum Duty Cycle TDUTY RT =3.0kΩ, CT =270pF, VFB =0.8V

85 %

Maximum Duty Cycle Change With Temperature

Δ TDUTY / ΔT TA = -10℃ to 85℃ 10 %

Total Device Section Standby Current ISTANDBY Pin 4 is open or =VCC 1 μA

Average Current Consumption IAVE RB =390Ω, VCC =0~15V 5.0 10 mA Error Amplifier Section Input Threshold Voltage VFB VCOMP =450mV 490 500 510 mV

VT Change With Voltage ΔVFB / ΔV VCC =2V to 15V 5 20 mV

VT Change With Temperature ΔVFB / ΔT TA = -10℃ to 85℃ 1 %

Input Bias Current IB -1.0 -0.2 1.0 μA Voltage Gain Av 100 V / V Frequency Bandwidth BW AV =0 dB 6 MHz

Output Voltage Swing Positive VPOS 0.78 0.87 V

Output Voltage Swing Negative VNEG 0.05 0.2 V

Output Source Current ISOURCE VCOMP =450 mV -40 -24 μA

Output Sink Current ISINK VCOMP =450 mV 24 40 μA

FP5139


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Parameter Symbol Test Conditions Min. Typ. Max. Unit

Output Section

Output High Voltage VOH1 RB=390Ω, IO=-15mA 1.0 1.2 V

VOH2 RB=750Ω, IO=-10mA, VCC= 1.8V

0.8 1.0 V

Output Saturation Voltage

VOL1 RB=390Ω, IO=15mA 0.1 0.2 V

VOL2 RB=750Ω, IO=10mA, VCC= 1.8V

0.1 0.2 V

Output Source Current IOSOURCE RB=390Ω, Vo=0.9V -40 -20 mA

Output Sink Current IOSINK RB=390Ω, Vo=0.3V 30 40 - mA

Internal Pull-Down Resistor RO 20 30 40 kΩ Output Current Setting / Control Section

Pin Voltage VBR RB=390Ω 0.15 0.22 0.3 V

Input Off Condition IOFF -20 0 μA Input On Condition ION -45 μA Pin Current Range IBR -1.8 -0.1 mA

FP5139


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Typical Operating Characteristics (VCC=2V, TA= 25°C, unless otherwise noted)

0 4 8 12 16 200

2

4

6

8

10

12TA=25 ℃

RB=390Ω

Supply Voltage Vcc(V)

Figure 1

Supply Voltage vs. Supply Current

0 4 8 12 16 200

0.2

0.4

0.6

0.8

1.0

1.2TA=25 ℃

Supply Voltage Vcc(V)

Figure 2

Supply Voltage vs. InputThreshold Voltage

25 0 25 50 75 100-15

-10

-5

0

5

10

30Vcc =2V

Ambient temperature vs. Input threshodvoltage variation ratio

A m bient Temperature TA ( ℃ )

Figure 3

0 -10 -20 -30 -40 -500

0.2

0.4

0.6

0.8

1.0

1.2

High Level Output Current Iout (mA)

Figure 4

High Level Output

Vcc=2VRB=390 ΩTA=25 ℃

0 20 40 60 80 1000

100

200

300

400

500

600

Low level output current Iout (mA)

Figure 5

Low level output

Vcc=2VRB=390TA=25 ℃

0 -0.4 -0.8 -1.2 -1.6 -2.00

-10

-20

-30

-40

-50

-60

BR / CTL pin current IBR (mA)

Figure 6

BR / CTL pin Current vs. Output Source Current

Vcc=2VV OUT =0.9V

TA=25 ℃

FP5139


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FP5139


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Function Description Voltage Reference

A 1.25V regulator operating from VCC is used to power the FP5139 internal circuitry. An internal

resistive divider provides 0.5V reference for the error amplifier, Soft-start (0.9V typ.) and SCP (0.8V

typ.) 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 equation (see figure12):

5.02R1R1VOUT

1

8

0.5V

36K

500

VOUT

R1

R2

C1

FP5139

Error Amplifier

Figure 12 Error Amplifier with Feedback resistance divider Oscillator

The oscillator frequency can be set from 20KHz to 1MHz by connecting a resistor and a

capacitor at OSC pin of FP5139 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 0.1V and a

maximum value of approximately 0.6V. The PWM comparator compares the oscillator voltage with

error amplifier output voltage, internal maximum duty control voltage (0.6V typ.) and soft start setting

voltage. When the sawtooth wave voltage is lower than all of above three-output voltage, the output of

FP5139 is high (Turn on external NPN transistor or NMOS).

FP5139


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Under Voltage Lockout (UVLO) The under voltage lockout circuits turn the output off whenever the supply voltage drops too low

(approximately 0.9V at 25℃) for proper operation. A hysteresis voltage of 200mV eliminates false triggering on noise and chattering.

Soft Start/ Short-circuit protection (SS / SCP)

The soft start is functional after power on. The interval of soft start time is determined by a

capacitor connected to SCP pin (pin 2). 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:

[ ] [ ]FμC×35.0=mSTss The short circuit protection is triggered when a heavy loading makes output voltage drop and

error amplifier output (COMP pin) is larger than VPOS (0.9V typ.). The SS pin capacitor will be charged

to the SCP threshold voltage (0.8V typ.), then FP5139 output is disabled (internal pull-low) and the

capacitor is discharged to low.

The time of short circuit protection is:

[ ] [ ]FμC×8.0=mSTscp

Output Transistor The FP5139 has a totem-pole transistor with a 40mA source/sink current capability 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 FP5139. (see figure 13)

Figure 13 Output Transistor Driving Control Circuit

FP5139


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BR / CTL pin can also use to control the output of FP5139 for disable or enable function of

system.

Control Pin Q1 BR / CTL Pin Output Transistor Function Mode Low Off Open Disable Stand-by

High On Bias Current Enable Operation

FP5139


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Application Information

Vout 9V/0.5AVin 3V

Vin

R4390

CA10.1uF

L1 10uH

R251k

R120k

C11220uF

C50.1uF

Q1NPN

R63k

C20.1uF C8

0.1uFC7

220uF

Q4NPN

R7 4.7k

C10.1uF

IC1

FP5139

1

2

3

4 5

6

7

8FB

SCP

VCC

BR/CTL OUT

GND

OSC

COMP

R53.9k

C6330pF

Q2AP2306GN

Q5PNP

R3 0

D2

SM340A

SW1

ON/OFF Socket

12

Figure14 DC 3V to DC 9V Boost Converter Circuit

Vin 9~24V Vout 12V/2A

Vin

Q5PNP

Q1NPN

R4390

L1 22uH

C50.1uF

R246k

CA11uF

R120k

C4470uF

R62k

C20.1uF

C1010uF

D3

SR55

Q4NPN

QA1NPN

R7 4.7k

Cs1

22uF

C10.1uF

IC1

FP5139

1

2

3

4 5

6

7

8FB

SCP

VCC

BR/CTL OUT

GND

OSC

COMP

C6470pF

R53.9k

DA110V

Q2AP9974AGH

L2

22uHR3 0

C7330uF

RA13k

SW1

ON/OFF Socket

12

Figure15 DC 9V~24V to DC 12V SEPIC Converter Circuit

FP5139


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C160.1uF

R6R

R17 4.7k

SW1

ON/OFF Socket

12

R14

1k

R13 0

C100.1uF

C17

470pF

R9

R163k

C1 0.1uF

R12

51k 1%

C70.1uF

Vin

CON3

Vot Socket3

12

R7R

Vout2

R8R

L1 33uHD5 SCD34

C51uF

D2

BAT54S/SOT_0

3

1

2

CON1

Vot Socket2

12

C15

100uF

CON4

Vot Socket1

12

C11

R1R

Vout3Q2NPN BEC

Vout1

IC1

FP5139

1

2

3

4 5

6

7

8FB

SCP

VCC

BR/CTL OUT

GND

OSC

COMP

Vout1

D4

TL431

32

1

C2 0.1uF

Vout2

C81uF

R3R

Q6NPN 3904

CON2

Vin Socket

12

R15

3k 1%

L2 33uH

Vout3

C14

0.1uF

C61uF

Q1

MOSFET P

1

32

Q4

NPN R10R

C41uF

C12

220uF/6.3V

C91uF

Q3

R5R

D1 BAT54S/SOT_0

3

1

2

D3

TL431

32

1

Vin

C13

100uF

R4

R11

R2R

Vin Q5MOSFET N GDS1

23

C31uF

Figure16 Charge Pump DC-DC Converter Circuit

VCC

+C1

330uF

D5 BAT54HT1

+ C8100uF/25V

(R9+R8)=17.48*R12

C2104

V3

Q22N3904

R11

5.1K

COMP

L1 18uH

R5220

0.66*(R8+R9)=(R10+R11)

F1

FUSE

+15V

R1

33KON / OFF

R9

56K

V3

R210K

L3 33uH

R4

V1

+ C12100uF/16V

R33K

R123.3K

+3.3V

C50.1uF

V2

R8

1.8K

R7

+ C1347uF/16V

+ C14100uF/16V

D2 BAT54HT1

R6 0

C161nF

+ C10100uF/16V

D4

BAT54RCLT1

C7470pF

D3

BAT54RCLT1

L4 33uH

L2 33uH

+5V

+ C947uF/16V

+ C1547uF/16V

D68.2

V2

L5 33uH-7.5V

C6

CTL

U1

FP5139

1

2

3

4 5

6

7

8FB

SCP

VCC

CTL OUT

GND

Cosc

COMP

V4

FBR10

33K

C40.47uF

+ C1147uF/16V

Q3AP2304

1

32

C3270pF

SCP

T1

CLS12

4

1

6

7

8

9

10

2

5

3

Figure17 Flyback Multi-Output DC-DC Converter Circuit

FP5139


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Timing Waveform

Soft-startts

COMP pin Voltage

Soft-start setting voltage

OUT pin waveform

SS/SCP pin waveform

Idle period setting voltage

Oscillator waveform

Control pin voltage

OutputShortCircuit

Output Short Circuit

tpe

Short Circuit Protection

IC Shutdown

Reference input forSCP Comparator

Figure18 FP5139 Timing Diagram

FP5139


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Package Outline TSSOP-8L

UNIT: mm

Notes:

1. Package dimensions are in compliance with JEDEC outline: MO-153 AA.

2. Dimension “D” does not include molding flash, protrusions or gate burrs.

3. Dimension “E1” does not include inter-lead flash or protrusions.

Symbols Min. (mm) Max. (mm) A 1.200

A1 0.050 0.150

A2 0.960 1.060

D 2.900 3.100

E 6.400 BSC

E1 4.300 4.500

L 0.450 0.750

θ° 0° 8°

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Asynchronous Boost Controller - Feeling Tech · 2012. 3. 14. · FP5139 Asynchronous Boost Controller This datasheet contains new product information. Feeling Technology reserves