AP6714 [DIODES]
1.8MHz SYNCHRONOUS BOOST CONVERTER; 为1.8MHz同步升压转换器
| 型号： | AP6714 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | 1.8MHz SYNCHRONOUS BOOST CONVERTER |
| 文件： | 总15页 (文件大小：262K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
General Description
Features
The AP6714 is fully integrated synchronous current mode boost
converter which provides a complete power supply solution for all
one-cell, two-cell, three cell, alkaline, NiCd or NiMh or single-cell
Lithion battery powered products. They improve performance,
component count and size compared to conventional controllers,
lithium-ion (Li+) designs. On-chip MOSFETs provide up to 94%
efficiency for critical power supplies. This optimizes overall
efficiency and cost, while also reducing board space. Operate at
one fixed frequency of 1.8MHz to optimize size, cost, and
efficiency. Other features include soft-start and overload
protection. AP6714 is available in space-saving 10-pin
MSOP package.
•
•
•
•
•
94% Efficient Step-Up DC to DC Converter
Wide Input Range 0.9V to 5.5V
1.8V to 5.5V Adjustable Output Voltage
1.8MHz Operating Frequency
Current Mode Operation for faster transient response
and better loop stability
1µA Shutdown Mode
Suitable with Low ESR Ceramic Capacitors (MLCC)
Over Current Protection
•
•
•
•
•
Over Temperature Protection
MSOP-10L: Available in “Green” Molding Compound
(No Br, Sb)
•
Lead Free Finish/ RoHS Compliant (Note 1)
Applications
•
•
•
•
•
All One-cell, Two-cell, Three cell, Alkaline, NiCd or NiMh or Single-cell Li+ Battery Powered Devices.
Cell Phones
Digital Cameras
MP3 Players
PDAs
Ordering Information
AP 6714 M10 G - 13
Package
Green
Packing
13 : Tape & Reel
M10 : MSOP-10L
G : Green
13” Tape and Reel
Package
Code
M10
Packaging
(Note 2)
MSOP-10L
Device
Quantity
2500/Tape & Reel
Part Number Suffix
AP6714M10G-13
-13
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP6714 Rev. 4
1 of 15
FEBRUARY 2009
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Pin Assignments
( Top View )
1
2
3
4
5
10
9
Vcc
EN
OUT
LX
8
CC
FB
OCP
7
PGND
SGND
REF
6
MSOP-10L
Pin Descriptions
Pin Name
VCC
Pin #
Description
1
2
Power Input pin
Enable Channel
EN
CC
3
Channel Compensation Pin
Channel Feedback Pin
Internal Reference Voltage
Signal Ground
FB
4
REF
SGND
PGND
OCP
LX
5
6
7
Power Ground
8
Over Current Protection
SW Pin
9
OUT
10
Boost Output Pin
AP6714 Rev. 4
2 of 15
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Block Diagram
VCC
CC
OUT
ZCR
Comparator
+
Smith - Trigger
Bias
EN
Oscillator
Ramp
Power-Good
-
Error
PWM
PWM
Amplifier
Comparator
Control
&
Anti -
Through
Logic
-
FB
By Pass
SGND
-
+
LX
+
Soft- Start
Vref=1.23V
OCP
Current - Limit
Thermal - shutdown
BANDGAP
OCP
Comparator
+
PGND
0.16V
-
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
KV
V
ESD HBM Human Body Model ESD Protection
ESD MM Machine Model ESD Protection
OUT, VCC, EN, FB, OCP to GND
LX to GND
3
250
-0.3 to +6.5
V
-0.3 to (OUT + 0.3)
1.6
V
ILX
LX Current
A
REF, CC to GND
-0.3 to (VCC + 0.3)
850
V
PD
TJ
Continuous Power Dissipation (TA = +25oC)
Operating Junction Temperature Range
Storage Temperature Range
mW
oC
oC
-40 to +125
-65 to +150
TST
Recommend Operating Conditions
Symbol
TA
Parameter
Operating Ambient Temperature Range
Supply Voltage at VIN (Note 3)
Output Voltage
Rating
-40 to +85
0.9 to 5.5
1.8 to 5.5
Unit
oC
V
VIN
VOUT
V
Notes:
3. The AP6714 is powered by step-up output. An internal low-voltage startup oscillator drives the starting at approximately 0.9V and the main
control will take over as soon as output is reached. AP6714 operation could be kept in low input voltage and output current is just limited.
AP6714 Rev. 4
3 of 15
FEBRUARY 2009
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Electrical Characteristics (VCC = 3.6V, TA = 25oC, unless otherwise noted)
Symbol
GENERAL
ISTB
Parameter
Conditions
Min
Typ.
Max
Unit
Standby Current
Supply Current
VCC =3.6V ,VEN=0V
VCC =EN = 3.6V, FB = 1.5V
-
-
0.5
150
1
300
µA
µA
ICC
REFERENCE
VREF
ΔVREF/ΔT
Reference Output Voltage
Tempco of Reference
1.205
1.23
30
4.5
1.3
1.255
50
10
V
ppm/ oC
mV
-40 oC ≤T≤125 oC
10mA < ILOAD < 200mA
2.8 < VCC < 5.5V
VREF(LOAD) Reference Load Regulation
VREF(LINE) Reference Line Regulation
OSCILLATOR
-
-
5
mV
FOSC
STEP-UP DC-TO-DC
Tempco of Output Voltage
OSC Frequency
1400
1800
2200
KHz
ppm/ oC
nA
ΔVOUT/ΔT
IOUT=10mA, -40 oC≤T≤85 oC
FB = 1.25V
50
0.01
85
1
2
100
+100
90
5
5
FB Input Leakage Current
Duty Step-Up Maximum Duty Cycle FB = 0V
-100
80
-
-
%
µA
µA
IOUT
ILXL
OUT Leakage Current
LX Leakage Current
VLX = 0V, OUT = 5V
VLX = OUT = 5V
N channel, Vcc= 5V
P channel, Vcc= 5V
VIN=1.5V (Note 4)
-
-
200
300
1.4
-
-
RDS(ON) Switch On-Resistance
ILM N-Channel Current Limit
mΩ
1.2
1.6
A
THERMAL-SHUTDOWN PROTECTION
Thermal Shutdown
-
-
150
40
-
-
oC
oC
Thermal Hysteresis
LOGIC INPUTS
EN Input Low Level
EN Input High Level
1.5V < VCC < 5.5V
1.5V < VCC < 5.5V
-
-
-
0.4
-
V
V
0.8
OVER CURRENT PROTECTION
Over Current Protection
Voltage
VOCP
ROCP=0.1Ω
-
0.16
-
V
THERMAL RESISTANCE
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
θJA
MSOP-10L (Note 5)
MSOP-10L (Note 5)
161
43
oC/W
oC/W
θJC
Notes:
4. The step-up current limit in startup refers to the LX switch current limit, not the output current limit.
5. Test condition for MSOP-10L: Device mounted on 2oz copper, minimum recommended pad layout on top & bottom layer with thermal vias,
double sided FR-4 PCB.
AP6714 Rev. 4
4 of 15
FEBRUARY 2009
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Application Circuit (Note 6)
VOUT
U1
1
10
VCC
OUT
1 MOhm
L1
2.7uH
R2
2
9
EN
CC
FB
LX
OCP
VIN
Rocp
27 KOhm
0.1 Ohm
3
4
Rcc
8
7
PGND
SGND
RTOP
5
6
REF
CIN
10u
COUT
10u
C2
C3
AP6714
470p
0.1u
RBOTTOM
RTOP
VOUT =VFB ×(1+
)
RBOTTOM
Notes:
6. Recommended minimum R : 100 KΩ.
BOTTOM
Typical Operating Characteristics
Supply Current vs. Input Voltage
Supply Current vs. Temperature
300
275
250
225
200
175
150
125
100
300
275
250
225
200
175
150
125
100
VIN=2.4V
VIN=3.6V
0.9 1.5 1.8 2.4
3
3.6 4.2
5
-40
-25
25
85
125
Input Voltage (V)
Temperature (
)
℃
Figure. 1
Figure. 2
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
Frequency vs. Temperature
Stand-by Current vs. Temperature
2050
2000
1950
1900
1850
1800
1750
1700
1.4
1.2
1
VIN=1.5V
VIN=3.0V
0.8
0.6
0.4
0.2
0
-40
-25
25
85
105
125
-40
25
105
125
Temperature (
)
℃
Temperature (
)
℃
Figure. 3
Figure. 4
Max Duty vs. Temperature
Vref vs. Temperature
(Vout=5.5V Iout=10mA)
88
87
86
85
84
83
82
81
1.26
1.25
1.24
1.23
1.22
1.21
1.2
VIN=1.8
VIN=3.6
1.19
-40
-25
25
85
105
125
-40
-25
25
105
125
Temperature (
)
℃
Temperature (
Figure. 6
)
℃
Figure. 5
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
Input Voltage vs. Max Start Up Current
(Vout=3.3V)
Input Voltage vs. Current Limit
Vout=3.3V ROCP=0.1Ω
1400
1200
1000
800
600
400
200
0
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
Iout
Isw
Iout
Isw
0.9
1
1.1 1.2 1.3 1.4 1.5 1.8
2
2.2 2.4
0.9
1
1.2 1.3 1.5 1.8
2
2.4 2.6
3
Input Voltage (V)
Input Voltage (V)
Figure. 7
Figure. 8
EFFI. vs. Output Current
(Vin=1.3V Vout=2.5V)
EFFI. vs. Output Current
(Vin=1.5V Vout=2.5V)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
10
30
50
80
100 150 200 250
10
50
100
150
200
300
Output Current (mA)
Output Current (mA)
Figure. 9
Figure. 10
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
EFFI. vs. Output Current
(Vin=1.5V Vout=3.3V)
EFFI. vs. Output Current
(Vin=1.3V Vout=3.3V)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
10
50
100
150
200
300
10
30
50
80
100
150
200
Output Current (mA)
Output Current (mA)
Figure. 11
Figure. 12
EFFI. vs. Output Current
(Vin=2.0V Vout=3.3V)
EFFI. vs. Output Current
(Vin=2.5V Vout=3.3V)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
50
100
150
200
300
400
500
50
100
150
200
300
400
500
Output Current (mA)
Output Current (mA)
Figure. 13
Figure. 14
AP6714 Rev. 4
8 of 15
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
EFFI. vs. Output Current
(Vin=3.6V Vout=5.0V)
EFFI. vs. Output Current
(Vin=3.0V Vout=3.3V)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
50
100
150
200
300
400
500
50
100
150
200
300
400
500
Output Current (mA)
Output Current (mA)
Figure. 15
Figure. 16
EFFI. vs. Output Current
(Vin=4.2V Vout=5.0V)
EFFI. vs. Output Current
(Vin=4.5V Vout=5.0V)
100
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
50
100
150
200
300
400
500
50
100
150
200
300
400
500
Output Current (mA)
Output Current (mA)
Figure. 17
Figure. 18
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
Switching Current vs. Output Ripple
Switching Current vs. Output Ripple
Figure. 20
Figure. 19
Load Transient Response
Load Transient Response
Figure. 21
Figure. 22
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
Load Transient Response
Load Transient Response
Figure. 23
Figure. 24
Load Transient Response
Load Transient Response
Figure. 25
Figure. 26
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Typical Operating Characteristics (Continued)
Power On Wave
Power On Wave
Figure. 28
Figure. 27
Application Information
Input Capacitor Selection
The input filter capacitor reduces peak currents drawn from the input source and reduces input switching
noise .In most applications a 10uF is recommended.
Output Capacitor Selection
The major parameter necessary to define the output capacitor is the maximum allowed output voltage ripple
of the converter. This ripple os determined by two parameters of the capacitor, the capacitance and the ESR
(Equivalent Series Resistance). It is possible to calculate the minimum capacitance needed for the defined
ripple, supposing that ESR is zero, by using Equation below:
IOUT × (VOUT −VIN )
CMIN
=
f × ΔV ×VOUT
where
f =the switching frequency
△V =the maximum allowed ripple
Shutdown Mode
The AP6714 converter will stop switching by setting EN pin Low, and is turned on by pulling it high. If this
feature is not used, the EN pin should be tied to VCC pin to keep the regulator output on all the time. To
ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below
the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Application Information (Continued)
Inductor Selection
The high frequency operation of the AP6714 allows the use of small surface mount inductors. The minimum
inductance value is limited by the following constraints:
VIN (MIN ) × (VOUT (MAX ) −VIN (MIN )
)
L >
H
f × ISW (Ripple) ×VOUT (MAX )
Where
f= Operating frequency (Hz)
ISW(Ripple)= Allowable Inductor Current Ripple (A)
VIN(MIN)= Minimum Input Voltage (V)
VOUT(MAX)= Maximum Output Voltage (V)
Over Current Protection (OCP)
A resistor is required to connect PGND pin and OCP pin to prevent an overload occurs at the output. The
output voltage will drop and duty cycle will be reduced if the OCP exceeds 0.16V. When ROCP is 0.1Ω, the
maximum switching current to operate normally is 1.6A (0.16V/0.1Ω). However, the actual switching current is
related to duty ratio. By the way, larger ROCP is recommended when VOUT − VIN ≤ 0.5V since the dropped output
voltage is smaller then regular case while an overload condition exists.
Internal circuit of OCP function
Thermal Information
The maximum recommended junction temperature (TJ) of AP6714 is 125°C. The thermal resistance of the
10-pin MSOP10 package is RθJA = 161°C/W, if the Power PAD is soldered. Specified regulator operation is
assured to an ambient temperature TA of 45°C. Therefore, the maximum power dissipation is about 500mW.
More power can be dissipated if the maximum ambient temperature of the application is lower.
TJ (MAX ) −TA
PD(MAX )
=
RθJA
Designing a PC Board
Good PC board layout is important to achieve optimal performance from AP6714. Poor design can cause
excessive conducted and/or radiated noise. Conductors carrying discontinuous currents and any high-current
path should be made as short and wide as possible. A separate low-noise ground plane contain-ing the
reference and signal grounds should connect to the power-ground plane at only one point to minimize the
effects of power-ground currents. Typically, the ground planes are best joined right at the IC. Keep the
voltage-feedback network very close to the IC, preferably within 0.2in (5mm) of the FB pin. Nodes with high
dV/dt (switching nodes) should be kept as small as possible and should be routed away from high-impedance
nodes such as FB.
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
Marking Information
( Top View )
10
9
8
7
6
A~Z : Green
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
Logo
Part Number
Y W X
6714
2
3
4
5
1
MSOP-10L
Package Information (All Dimensions in mm)
(1) Package type: MSOP-10L
1
10x-0.30
8x-0.50
1
0.17/0.27
1
Land Pattern Recommendation
2.95/3.05
(Unit:mm)
Seting plane
0.5Typ.
C
C
0.10
"A"
Gauge plane
DETAIL "A"
0.4/0.7
AP6714 Rev. 4
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AP6714
1.8MHz SYNCHRONOUS BOOST CONVERTER
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agreeto hold Diodes Incorporatedand all the companieswhose products are represented onour website, harmlessagainst all damages.
LIFE SUPPORT
Diodes Incorporated productsare not authorizedfor use as criticalcomponents in lifesupport devices or systemswithout theexpressed written approval of the
President of DiodesIncorporated.
AP6714 Rev. 4
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