SGM3756 [SGMICRO]
38V High Efficiency, Boost White LED Driver with PWM Dimming Control;
| 型号： | SGM3756 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | 38V High Efficiency, Boost White LED Driver with PWM Dimming Control |
| 文件： | 总15页 (文件大小：725K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM3756
38V High Efficiency, Boost White
LED Driver with PWM Dimming Control
GENERAL DESCRIPTION
FEATURES
The SGM3756 is an asynchronous Boost WLED driver
with high efficiency, low EMI and high output voltage.
The Boost converter integrates a 40V, 1.5A internal
FET which operates at 1.2MHz switching frequency. Its
strong driving ability can drive single or multiple parallel
LED strings, which can be used as LED driver for smart
phone and tablet backlight.
• Input Voltage Range: 2.7V to 5.5V
• 1:250 Stable Luminance Dimming
• Low EMI by Conducting Ringing Cancelling
• Improved PSRR for Waveless Lighting
• Up to 90% Efficiency
• Switching Frequency: 1.2MHz
• Integrated 40V/1.5A Switch
• Feedback Voltage: 200mV
The default LED current can be programmed by the
external current-sense resistor RSET. By varying the
duty cycle of the PWM signal applied to the CTRL pin,
the internal reference voltage is adjusted, which
ultimately adjusts the LED sink current. With full PWM
duty cycle, the internal reference voltage VREF is 200mV
(TYP). The SGM3756 is essentially a driver that adopts
analog dimming control, and it will not produce audible
noise on the output capacitor. The SGM3756 integrates
ringing cancellation, and it can effectively reduce EMI
noise in DCM mode. The SGM3756 provides excellent
line regulation and load regulation, as well as excellent
load transient response. The SGM3756 also features
various protection functions such as open LED
protection, OCP protection and thermal shutdown
protection.
• PWM Dimming Control
• 38V Open LED Protection for 10 LEDs in Series
• Automatic Soft-Start for Reduced Inrush Current
• Under-Voltage Lockout Protection
• Thermal Shutdown
• -40℃ to +85℃ Operating Temperature Range
• Available in a Green TDFN-2×2-6L Package
APPLICATIONS
Portable Devices Backlight
Small and Medium Size White LCD Display Backlight
The SGM3756 is available in a Green TDFN-2×2-6L
package. It operates over an ambient temperature
range of -40℃ to +85℃.
SG Micro Corp
SEPTEMBER2022–REV. A. 1
www.sg-micro.com
38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
3756
XXXX
SGM3756
TDFN-2×2-6L
SGM3756YTDI6G/TR
Tape and Reel, 3000
-40℃ to +85℃
MARKING INFORMATION
NOTE: XXXX = Date Code.
X X X X
Date Code - Week
Date Code - Year
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
OVERSTRESS CAUTION
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
Voltage on VIN, CTRL, FB................................... -0.3V to 6V
Voltage on SW................................................... -0.3V to 40V
Package Thermal Resistance
TDFN-2×2-6L, θJA.................................................... 120℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range........................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
HBM.............................................................................2000V
MM.................................................................................200V
CDM ............................................................................1000V
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range...........................................2.7V to 5.5V
Output Voltage Range ........................................... VIN to 38V
Inductor........................................................... 4.7μH to 10μH
Input Capacitor ...................................................... 1μF (MIN)
Output Capacitor.................................................1μF to 10μF
Operating Temperature Range.......................-40℃ to +85℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
2
38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
PIN CONFIGURATION
(TOP VIEW)
FB
NC
1
2
3
6
5
4
VIN
CTRL
SW
GND
GND
TDFN-2×2-6L
PIN DESCRIPTION
PIN
NAME
I/O
FUNCTION
1
2
3
FB
NC
I
-
Feedback Input for Current. Connect the sense resistor between FB and GND.
No Connection.
Ground.
GND
O
The Switch Pin of the Device. It is connected to the drain of the internal
N-channel power FET.
4
SW
I
5
6
CTRL
VIN
I
I
PWM Dimming Input.
Input Supply Pin.
NOTE: I: input, O: output.
TYPICAL APPLICATION
L
10μH
D
6
4
1
VBAT
2.7V to 5.5V
VIN
SW
COUT
1μF
CIN
22μF
SGM3756
5
3
10S1P
CTRL
GND
PWM Dimming Control
FB
RSET
10Ω
Figure 1. Typical Application
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SEPTEMBER 2022
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
ELECTRICAL CHARACTERISTICS
(VIN = 3.6V, CTRL = VIN, CIN = 22μF, Full = -40℃ to +85℃, typical values are at TA = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP
MIN
TYP
MAX
UNIT
Power Supply
Input Voltage Range
VIN
Full
2.7
5.5
V
V
V
IN falling
2.2
2.3
100
0.2
+25℃
+25℃
+25℃
+25℃
+25℃
Under-Voltage Lockout Threshold
UVLO
VIN rising
2.5
UVLO Hysteresis
VHYS
IQ
mV
mA
μA
Operating Quiescent Current into VIN
Shutdown Current
VFB = 400mV, no switching
CTRL = GND
0.35
1
ISD
Boost Converter
PWM duty cycle 100%
PWM duty cycle 10%
PWM duty cycle 1%
PWM duty cycle 0.2%
VFB = 200mV
193.5
18.5
1.65
200
20.3
2.5
205.3
22.5
3.25
mV
mV
mV
mV
μA
ms
Ω
+25℃
+25℃
+25℃
+25℃
Full
Voltage Feedback Regulation Voltage
VREF
0.92
0.001
0.1
FB Pin Bias Current
IFB
tREF
RDS(ON)
fSW
0.3
VREF Filter Time Constant
N-Channel MOSFET On-Resistance
Switching Frequency
+25℃
+25℃
Full
0.5
0.8
0.9
1.15
36
1.2
1.45
1.85
39.5
MHz
A
Switching MOSFET Current Limit
Output Voltage Over-Voltage Threshold
Control
ILIM
1.5
+25℃
Full
VOVP_SW
38
V
CTRL Logic High Voltage
CTRL Logic Low Voltage
CTRL Pin Internal Pull-Down Resistor
CTRL Logic Low Time to Shutdown
PWM Dimming Frequency Range
Minimum PWM On-Time
VH
VL
Full
1.5
V
V
Full
0.4
RPD
tSD
600
kΩ
ms
kHz
ns
+25℃
+25℃
+25℃
+25℃
+25℃
CTRL high to low
2.5
10
DFR
100
100
40
Stable Dimming Range
DR
0.2
%
Thermal Shutdown
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
TSHUTDOWN
THYS
160
20
℃
℃
SG Micro Corp
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SEPTEMBER 2022
4
38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
RECOMMENDED COMPONENTS OF TEST CIRCUITS
COMPONENT
COMPONENT
INDUCTOR
DIODE
10μH/CD75NP-100KC
1μF/C2012X7R1H105KT
22μF/C2012X7R1H226KT
CAPACITOR
MBR0540
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25℃, L = 10μH, CIN = 22μF, COUT = 1μF, unless otherwise noted.
Output Ripple at PWM Dimming
Open LED Protection
VFB
PWM
AC Coupled
VOUT
VOUT
ILED
IL
VIN = 3.6V, ILED = 20mA, L = 10μH
VIN = 3.6V, ILED = 20mA, L = 10μH, 8LEDs
Time (200μs/div)
f
PWM = 50kHz, 10LEDs
Time (40μs/div)
Switching Waveform
Switching Waveform
VSW
AC Coupled
VSW
VOUT
AC Coupled
VOUT
IL
IL
VIN = 3.6V, ILED = 20mA, L = 10μH, 8LEDs
VIN = 5V, ILED = 350mA, L = 10μH, 3LEDs
Time (2μs/div)
Time (2μs/div)
Start-Up
Start-Up
VCTRL
VCTRL
VOUT
VOUT
IL
IL
VIN = 5V, ILED = 350mA, L = 10μH, 3LEDs
VIN = 3.6V, ILED = 20mA, L = 10μH, 10LEDs
Time (2ms/div)
Time (2ms/div)
SG Micro Corp
SEPTEMBER 2022
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5
38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TA = +25℃, L = 10μH, CIN = 22μF, COUT = 1μF, unless otherwise noted.
Feedback Voltage vs. PWM Duty Cycle
VIN = 3.6V
Feedback Voltage vs. PWM Duty Cycle
VIN = 3.6V
200
160
120
80
1000
100
10
fPWM = 40kHz
fPWM = 40kHz
fPWM = 20kHz
1
40
fPWM = 20kHz
0
0.1
0
20
40
60
80
100
0.1
1
10
100
PWM Duty Cycle (%)
PWM Duty Cycle (%)
Efficiency vs. Output Current
VIN = 3.6V, L = 10μH
Feedback Voltage Production Distribution
50
45
40
35
30
25
20
15
10
5
100
80
60
40
20
0
100 Samples
1 Production Lot
6LEDs
4LEDs
8LEDs
DPWM = 1%
DPWM = 100%
10LEDs
DPWM = 0.2%
DPWM = 10%
4LEDs (12.8V), 6LEDs (19.2V)
8LEDs (25.6V), 10LEDs (32V)
0
0
5
10
15
20
25
30
0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5
Normalized Feedback Voltage
Output Current (mA)
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SEPTEMBER 2022
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
FUNCTIONAL BLOCK DIAGRAM
L
D
VOUT
VBAT
COUT
CIN
VIN
SW
OVP
UVLO
Current Sense
Current Limit and
Soft-Start
VIN
SW
tOFF
Generator
PWM
Generator
Gate Driver of
Power MOSFET
tON
Current Sense
FB
VREF
RSET
GM Amplifier
CTRL
PWM Dimming
Reference Control
GND
Shutdown
Figure 2. Functional Block Diagram
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SEPTEMBER 2022
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
DETAILED DESCRIPTION
The SGM3756 is an asynchronous Boost converter that
operates at 1.2MHz switching frequency and integrates
a power FET with peak current limit of 1.5A. The
maximum output voltage can reach 38V. The device is
capable of driving LEDs from 1 series to 10 series and
the input voltage range is 2.7V to 5.5V. The strong
driving capability of the device can drive single or
multiple parallel LED strings, which can be used as
LED driver for smart phone and tablet backlight.
remains in shutdown until the CTRL pin is toggled to
logic high. This function can effectively prevent the
device from being damaged when the output voltage
exceeds VOVP threshold.
Shutdown
When the CTRL pin remains low voltage for more than
2.5ms, the SGM3756 enters shutdown mode. In
shutdown mode, the internal switch FET stops
switching, and the device maintains in a low loss
condition. At the same time, the minimum forward
voltage of the LED array should be kept higher than the
maximum input voltage. Otherwise a DC current path is
resulted from the inductor and Schottky diode to the
LED array.
The SGM3756 operates with peak current control, and
the internal compensation circuit greatly reduces the
complexity of the design. The loop design can be
completed with only one external sampling resistor
R
SET. Peak current mode controls the on time of the
switching FET by comparing the error signal of the
internal GM amplifier with the inductance current signal.
Current Program
Through the duty cycle of the PWM signal added to the
CTRL pin, the SGM3756 can set the reference voltage
The FB pin voltage VFB depends on the internal
reference voltage VREF. At full PWM duty cycle, the
typical value of VREF is 200mV. The external
programming of LED current can be realized by using
the current-sense resistor connected in series with the
LED. The RSET resistor value is given by Equation 1:
VFB
VREF. When the duty cycle is 100%/10%/1%, the typical
values of VREF are 200mV/20.3mV/2.5mV respectively,
and the supported PWM signal has a wide frequency
range from 10kHz to 100kHz. It can realize linear
dimming in the range of PWM duty cycle 0.2% to 100%.
ILED
=
(1)
RSET
The SGM3756 also has excellent line regulation and
load regulation, as well as excellent load transient
response performance. It also has complete protection
functions, including open LED protection, OCP
protection and thermal shutdown protection. At the
same time, the output current can be programmed
through the resistor RSET connected to the FB pin.
where
ILED = sum of LED string(s) current
FB = FB pin regulation voltage
SET = current sense resistor.
V
R
The FB voltage accuracy and current sense resistor
accuracy determines the output current accuracy.
Soft Start-Up
LED Brightness Dimming
SGM3756 integrates the soft start-up function to ensure
that the output voltage of Boost converter rises slowly
by limiting the output voltage of GM amplifier during
start-up. This method effectively avoids the surge
current. After the start-up is completed, the device
switches to the internal reference voltage for
closed-loop control.
The PWM signal applied to the CTRL pin controls the
LED current. For PWM dimming signal, the device
required PWM frequency range is 10kHz to 100kHz,
which can obtain accurate reference voltage and small
LED current ripple. The LED brightness dimming can
be realized by changing PWM duty cycle. The
relationship between duty cycle and FB regulation
voltage is calculated by Equation 2:
Open LED Protection
VFB = Duty × 200mV + 0.75mV
(2)
Open LED protection feature shuts off the IC in case of
LED or RSET disconnection, which prevents damage to
the device. The SGM3756 monitors the voltage of SW
pin in each switching cycle. When VSW exceeds VOVP
threshold for 8 consecutive cycles, the device turns the
switch FET off, and shuts down the IC. The device
where
Duty = duty cycle of the PWM signal
200mV = internal reference voltage
0.75mV = most appreciate maximum from production
statistics
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SEPTEMBER 2022
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
DETAILED DESCRIPTION (continued)
The LED brightness is easily adjusted by controlling the
duty cycle of the PWM signal applied to CTRL pin. The
recommended minimum PWM duty cycle is 0.1% for no
blind dimming.
However, it should be noted that since the reference
voltage VREF is obtained by the charge and discharge of
the RC low-pass filter, the VREF has a ripple voltage with
the same frequency as the PWM signal, which will
significantly increase the LED ripple current. With the
increase of PWM signal frequency, the ripple voltage of
As shown in Figure 3, the SGM3756 adjusts the 200mV
reference voltage based on PWM duty cycle of the
VREF decreases, and the LED ripple current decreases.
CTRL pin. The PWM reference voltage is then filtered
by the internal RC filter. The RC filter output is then fed
to the non-inverting input of the error amplifier. The
advantage is that the value of the reference voltage
VREF only depends the duty cycle of the PWM signal
and does not depend on the amplitude. Under this
working principle, although the PWM signal is used for
dimming, its essence is an analog dimming. The PWM
signal is only used to modulate the reference voltage
Under-Voltage Lockout
Under-voltage lockout prevents the device from
operating at input voltage below 2.2V (TYP). When VIN
falls below 2.2V, the device enters shutdown mode and
the internal switch FET is turned off. If VIN reaches 2.3V
(TYP), the IC will resume operation.
Thermal Shutdown
VREF, which can avoid the occurrence of audible noise.
When the junction temperature of the IC exceeds 160℃
(TYP), the internal thermal shutdown is triggered and
the device enters the shutdown state. When the
junction temperature is dropped by 20℃ (TYP), the
device will restart and resume operation.
VBG
200mV
CTRL
VREF
EA Output
GM
Amplifer
Operation with CTRL
The CTRL pin is an enable control pin with logic high
voltage of 1.5V and logic low voltage of 0.4V. When the
control voltage of CTRL pin is higher than 1.5V and the
input voltage is higher than the UVLO threshold, the
device starts up. When the control voltage of CTRL pin
is lower than 0.4V, the device enters shutdown mode
and the switch FET is turned off.
FB
Figure 3. FB Voltage Adjustment via PWM Signal
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
APPLICATION INFORMATION
The SGM3756 is a 38V high-efficiency and low EMI
Boost DC/DC converter, which supports dimming by
changing the duty cycle of the PWM signal applied to
CTRL pin. The stable dimming range is 0.2% to 100%.
The device has excellent line regulation, load regulation
and transient response performance. It can be widely
used in various panel backlight lighting.
Use the minimum input voltage, maximum output
voltage, and maximum load current to calculate the
worst-case average current. The selected inductor
should provide a peak to peak ripple current ΔIL(P-P) to
be 30% to 40% of inductor average DC current IL (DC)
calculated in Equation 3. Use Equation 4 to calculate
the peak-to-peak inductor current.
1
Design Requirements
(4)
∆IL(P−P)
=
1
1
In this design example, Table 1 lists the operating
conditions. The LED array adopts 10S1P, and the
output current of each string of LED is 20mA.
L×
+
× f
S
VOUT − V
V
IN
IN
where
Table 1. Design Parameters
ΔIL(P-P) = Inductor peak-to-peak ripple
L = Inductor value
fS = Boost switching frequency
DESIGN PARAMETER
Input Voltage Range
EXAMPLE VALUE
2.7V to 5.5V
VOUT = Boost output voltage
Output, LED Number per String
Output, LED String Number
Output, LED Current per String
10
1
VIN = Boost input voltage
Use Equation 5 to calculate the peak inductor current.
20mA
∆IL(P−P)
IL(P) = IL(DC)
+
(5)
2
Inductor Selection
Inductance is an important power device for Boost
converter design. Selecting appropriate inductor
parameters can ensure that the system has high
efficiency and stable steady-state performance. At the
same time, it will also affect the system transient
response and loop stability. Inductor’s DC resistance,
saturation current and inductance are important specs
for DC/DC design. Large inductance results in small
ripple current, which is beneficial to smaller output
ripple voltage and higher transmission efficiency. Use
Equation 3 to calculate the average inductor current
The saturation current value of inductor will affect the
operation of Boost converter. When the inductor current
is close to or higher than the saturation current, the
inductance will drop rapidly, which causes the peak
inductor current to rise and reach the peak current limit
of the IC. The selected inductor’s saturation current
should maintain a 20% margin, and a 4.7μH to 10μH
inductor is recommended for SGM3756.
Schottky Diode Selection
In order to ensure the best efficiency of SGM3756, the
selected Schottky diode should have low forward
voltage, fast reverse recovery speed, and low junction
capacitance. At the same time, the average and peak
current ratings of the selected diode should exceed the
average output current and peak inductor current. It is
IL(DC)
:
VOUT ×IOUT
IL(DC)
=
(3)
V ×η
IN
where
VOUT = Boost output voltage
OUT = Boost output current
VIN = Boost input voltage
recommended to have
a
20% current margin.
I
Additionally, the Schottky diode reverse breakdown
voltage should be higher than the open LED protection
voltage threshold to avoid damage. It is recommended
to use ONSemi NSR0240 for the SGM3756.
η = power conversion efficiency.
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
APPLICATION INFORMATION (continued)
150℃ − TA
Output Capacitor Selection
The output capacitance of SGM3756 is used to meet
P =
(7)
D
θJA
the loop stability and output ripple requirement. At the
same time, it affects the loop bandwidth and the
where
TA = the ambient temperature for the application.
transient response performance. MLCC capacitor with
low ESR is recommended as the output capacitor. For
a given output voltage ripple requirement, the minimum
output capacitance value can be calculated according
to Equation 6:
θJA = the thermal resistance junction-to-ambient given
under absolute maximum ratings section.
Power Supply Recommendations
The SGM3756 operates with an input voltage range of
2.7V to 5.5V. It is recommended to use 22μF MLCC
V
− V ×I
(
)
capacitor as the input capacitor. If the SGM3756 is
located far away from the input power supply, an
additional high-capacity capacitor is recommended to
damp the wiring inductance.
OUT
IN
OUT
COUT
=
(6)
VOUT × fS × VRIPPLE
where
RIPPLE = peak-to-peak output ripple.
V
EMI Precaution and Ringing Cancelling
Careful layout, routing and selection of decoupling
components are critical to suppress EMI related noise.
A 1μF to 10μF MLCC capacitor is recommended for
typical application. Since the reference voltage VREF is
obtained by filtering the pulse signal, the actual output
ripple contains the pulsed ripple, which carries the
same frequency as the PWM signal. The interference
Ways of EMI suppression include propagation limit and
reduction of energy swings, such as inserting ferrite
bead in power supply trace, selecting high
self-resonance frequency decoupling capacitors and
SW node ringing cancellation. Figure 4 is a simplified
circuit showing that ringing is caused by diode’s
junction capacitance Cj and Boost inductor L, which
injects current swings into power supply traces; the 2
voltage waveforms on the right illustrate the difference
of circuit performance, with or without ringing
cancellation.
ripple can be effectively reduced by using 1μF MLCC
capacitor. For higher total output current applications, it
is recommended to use 2.2μF or larger MLCC output
capacitor to minimize output ripple.
LED Current Set Resistor
Use Equation 1 to calculate the RSET resistance.
Multiple resistors can also be connected in parallel to
obtain the required resistance value.
Normal Switching
Rectifier &
Waveform
Junction Capacitor
L
Source Plane
Thermal Considerations
Cj
Thermal dissipation of the IC should be considered to
design the SGM3756. High IC junction temperature will
trigger thermal shutdown. The heat loss is related to the
system input and output. Lower input voltage and
higher output current leads to more heat loss. The
thermal dissipation can be reduced by reasonable
layout. The allowable heat loss of device can be
determined by Equation 7:
Decoupling
Loopback
Anti-Ringing
Switching Waveform
Decoupling
Capacitor
Ground Plane
Figure 4. Ringing Cancellation Illustration
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38V High Efficiency, Boost White
SGM3756
LED Driver with PWM Dimming Control
APPLICATION INFORMATION (continued)
to VIN pin and GND pin to reduce the influence of
Layout Considerations
parasitic parameters on the line. The inductor and the
Schottky diode should be placed close to the SW pin to
reduce the area of the SW node, which reduces EMI.
The output capacitance COUT should be as close to
VOUT as possible, and the ground of COUT should be
close to GND pin to reduce grounding return. FB
resistors should be placed close to FB pin. For signal
grounding, it is recommended to route the ground
signal away from the power ground plane with small
and short traces, and connect the signal ground with
power ground via a single point close to the GND pin.
Layout design is an important step in all switching
power supplies design. Good layout plays a positive
role in loop stability, signal integrity and low EMI. Since
the switch FET of SGM3756 works at a typical
switching frequency of 1.2MHz, its power circuit layout
needs to be designed more carefully. The SW node
contains high dV/dt and di/dt switching. The area of SW
node should be as small as possible, and the input and
output loop needs to maintain the minimum loop path,
which can effectively suppress the generation of ringing.
For the high current path, it should be as wide and short
as possible. The input capacitance CIN should be close
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
SEPTEMBER 2022 ‒ REV.A to REV.A.1
Page
Updated Description section..............................................................................................................................................................................All
Changes from Original (JULY 2016) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
12
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TDFN-2×2-6L
D
e
N6
D1
L
E1
E
SEE DETAIL A
k
N3
N1
b
BOTTOM VIEW
TOP VIEW
1.40
0.65
A
A1
0.80
2.60
A2
SIDE VIEW
0.24
0.65
N2
N1
N2
N1
RECOMMENDED LAND PATTERN (Unit: mm)
DETAIL A
Pin #1 ID and Tie Bar Mark Options
NOTE: The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
0.800
0.050
MIN
0.028
0.000
MAX
0.031
0.002
A
A1
A2
D
0.700
0.000
0.203 REF
0.008 REF
1.900
1.100
1.900
0.600
2.100
1.450
2.100
0.850
0.075
0.043
0.075
0.024
0.083
0.057
0.083
0.034
D1
E
E1
k
0.200 MIN
0.650 TYP
0.008 MIN
0.026 TYP
b
0.180
0.250
0.300
0.450
0.007
0.010
0.012
0.018
e
L
SG Micro Corp
www.sg-micro.com
TX00055.001
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
TDFN-2×2-6L
7″
9.5
2.30
2.30
1.10
4.0
4.0
2.0
8.0
Q1
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
7″ (Option)
7″
368
442
227
410
224
224
8
18
SG Micro Corp
www.sg-micro.com
TX20000.000
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