HM4055DDR [HMSEMI]

9V Input Voltage Battery Linear Charger;


型号：	HM4055DDR
厂家：	H&M Semiconductor
描述：	9V Input Voltage Battery Linear Charger 电池
文件：	总16页 (文件大小：1147K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HM4055A

800mALithium Ion, 9V Input Voltage Battery Linear Charger HM4055A Series

General Description

Features

HM4055A is a complete constant-current/constant

voltage linear charger for single cell lithium-ion batteries.

Furthermore the HM4055A is specifically designed to

work within USB power specifications.



Maximum operating voltage 9V, improve system

reliability



Protection of battery cell reverse connection

No MOSFET sense resistor or blocking diode

required

No external sense resistor is needed and no

blocking diode is required due to the internal PMOSFET

architecture .Thermal feedback regulates the charge

current to limit the die temperature during high power

operation or high ambient temperature .The charge

voltage is fixed at 4.2V,and the charge current can be

programmed externally with a single resistor. The

HM4055A automatically terminates the charge cycle



Complete Linear Charger in ThinSOT Package for

Single Cell Lithium-Ion Batteries

Constant-Current/Constant-Voltage operation with

thermal regulation to maximize Rate Without risk of

overheating.



Preset 4.2V 、 4.34V charge voltage with ±1%

accuracy

when the charge current drops to 1/10^th

the



Automatic Recharge

programmed value after the final float voltage is

reached.

Charges Single Cell Li-Ion Batteries Directly from

USB Port

When the input supply (wall adapter or USB supply)

is removed the HM4055A automatically enters a low

current state dropping the battery drain current to less

than 2μA.The HM4055A can be put into shutdown

mode reducing the supply current to 55μA.



C/10 charge termination

55μA supply current in shutdown

2.9V trickle current charge threshold

Soft-Start limits inrush current

Charge Status Output Pin

Other features include charge current monitor,

undervoltage lockout, automatic recharge and a status.

Typical Application

Package



Cellular Telephones, PDAs, MP3 Players

Charging Docks and Cradles

Bluetooth Applications



5 - pin SOT23-5

6 - pin DFN2*2-6

Page 1

HM4055A

Typical Application circuit

Mainly used in Cellular telephones, MP3, MP4 players, digital still cameras, electronic dictionary, GPS, portable

devices and vary chargers.

600mA Single Cell Li-Ion Charger

Typical charge cycle（750mAh batter）

V_IN

4.5V TO 6.5V

700

4.75

4.5

CONSTANT CURRENT

600

500

400

300

200

100

CONSTANT

VOLTAGAE

CONSTANT

POWER

VCC

BAT

4.25

4.0

HM4055A

600mA

4.2V

PROG

3.75

3.5

V_CC=5V

GND

_JA=130℃/W

Li-Ion

1μF

1.65K

CHARGE

R_PROG=1.65K

BATTERY

3.25

TERMINATED

T_A=25℃

3.0

0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0

TIME(HOURS)

Selection Guide

HM 40 55 X X G-N

New Version

Environment mark

Package

MR：SOT23-5

DR：DFN2*2-6

Float voltage

A：4.2V

D：4.34V

Product Type

Product Series

H&M Semi

product series

HM4055AMR

HM4055ADR

HM4055DDR

product description

V_FLOAT=4.2V；Package：SOT23-5

V_FLOAT=4.2V；Package：DFN2*2-6

V_FLOAT=4.34V；Package：DFN2*2-6

NOTE: If you need other voltage and package, please contact our sales staff。

Page 2

HM4055A

Pin Configuration& Pin Assignment

SOT23-5

DFN2*2-6

Pin Assignment

Pin Num.

Symbol

Function

(SOT23-5) (DFN2*2-6)

Open-Drain charge status output

When the battery is being charged, the

CHRG

GND

pin is pulled low by an internal

switch, otherwise,

Ground

pin is in high impedance state.

Battery connection Pin

Connect the positive terminal of the battery to this pin. Dropping BAT pin’s

current to less than 2μA when IC in disable mode or in sleep mode. BAT pin

provides charge current to the battery and provides regulation voltage of

4.2V/4.34V.

BAT

Positive input supply voltage

Provides power to the internal circuit. When V_CCdrops to within 80mV of the

BAT pin voltage, the HM4055 enters low power sleep mode, dropping I_BAT

to less than 2μA.

VCC

Constant Charge Current Setting and Charge Current Monitor Pin

The charge current is programmed by connecting a resistor R_PROGfrom this

pin to GND. When in precharge mode, the PROG pin’s voltage is regulated to

0.1V. When charging in constant-current mode this pin’s voltage is regulated

PROG to 1V. In all modes during charging, the voltage on this pin can be used to

measure the charge current using the following formula:

V_PROG

R_PROG

I_BAT

*1100

Page 3

HM4055A

Block Diagram

Page 4

HM4055A

Absolute Maximum Ratings

Parameter

Input supply voltage : V_CC

PROG pin voltage

BAT pin voltage

Rating

Unit

-0.3～10

-0.3～VCC+0.3

-0.3～10

pin voltage

CHRG

BAT pin current

PROG pin current

800

μA

℃

1200

Maximum junction temperature

Operating ambient temperature :T_opa

Storage temperature :T_str

145

-40～85

℃

-55～150

℃

Soldering temperature and time

+260（Recommended 10S）

℃

SOT23-5

210

℃/W

Package thermal

impedance θ_JA

DFN2*2-6

SOT23-5

0.6

Maximum Power

Dissipation:Pd

DFN2*2-6

1.32

Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage.

These values must therefore not be exceeded under any conditions.

Electrical Characteristics

Symbol

V_CC

Parameter

Condition

Min

Typ. Max

Unit

●

Input supply voltage

4.0

5.0

150

9.0

500

100

●Charge mode, R_PROG=2.2KΩ

●Standby mode(charge end)

μA

static current

I_CC-I_BAT

●Shutdown mode （ R_PROGnot

connected, V_CC<V_BAT, or V_CC<V_UV）

100

μA

HM4055A-N

0℃≤T_A≤85℃

4.158

4.3

4.20

4.34

500

-2.5

4.25

4.38

575

Regulated output voltage

V_FLOAL

HM4055D-N

●R_PROG=2.2KΩ, current mode

425

-6

μA

●Standby mode: V_BAT=4.2V /4.34V

BAT pin current

I_BAT

(The condition of current mode

is V_BAT=3.9V)

Shutdown

connected

mode,

R_PROG

not

±1

±2

μA

Sleep mode, V_CC=0V

●V_BAT<V_TRIKL, R_PROG=10KΩ

-1

-2

3.0

μA

I_TRIKL

Trickle charge current

2.7

V_TRIKL

Trickle charge threshold voltage R_PROG=2.2KΩ, V_BATrising

2.85

Trickle voltage hysteresis

R_PROG=2.2KΩ

V_TRHYS

350

400

450

voltage

Page 5

HM4055A

V_CCunder voltage lockout

threshold

V_CCunder voltage lockout

hysteresis

V_UV

● V_CCfrom low to high

●

3.5

3.7

3.9

V_UVHYS

150

200

300

V_CCfrom low to high

V_CCfrom high to low

●R_PROG=2.2KΩ

100

0.9

140

180

110

V_CC-V_BATlockout threshold

voltage

V_ASD

I_TERM

termination current threshold

PROG pin voltage

V_PROG

V_CHRG

●R_PROG=2.2KΩ, current mode

=5mA

1.0

0.3

1.1

0.6

Pin output low voltage

Recharge battery threshold

voltage

ΔV_RECHRG

V_FLOAT-V_RECHRG

150

145

240

T_LIM

Thermal protection temperature

℃

The resistance of power

FET ”ON”（between V_CC

and BAT）

R_ON

650

mΩ

t_SS

Soft-start time

I_BAT=0 to I_BAT=1100V/R_PROG

μS

t_RECHARGERecharge comparator filter time V_BATfrom low to high

0.8

1.8

Termination comparator filter

time

t_TERM

I_PROG

I_BATbelow I_CHG/10

0.8

1.8

2.0

μA

PROG pin pull-up current

Note: The ● denotes specifications which apply over the full operating temperature rang, otherwise specifications are

at T_A=25℃，V_CC=5V，unless otherwise specified.

Typical performance characteristics

Vfloat VS VCC

4.24

4.22

4.2

4.18

Vfloat

4.16

R_PROG=11KΩ

4.14

T_A=25℃

4.12

4.1

4.5

5 5.5 6 6.5 7 7.5 8 8.5 9

VCC（V）

Page 6

HM4055A

PROG VS VCC

1.1

1.075

1.05

1.025

PROG

V_BAT=3.9V

R_PROG=11KΩ

T_A=25℃

0.975

0.95

4.5

5.5

6.5

7.5

8.5

VCC（V）

Vfloat V Temperature

4.26

4.24

4.22

4.2

4.18

4.16

4.14

4.12

4.1

Vfloat V

VCC=5V

V_BAT=3.9V

R_PROG=11K

-40 -20

100 120 140

Temperature

VPROG V Temperature

1.2

0.8

0.6

0.4

0.2

VPROG V

VCC=5V

R_PROG=11KΩ

-40

-20

100

120

140

Temperature

Page 7

HM4055A

Description of the Principle

The HM4055 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries.

Constant-current/constant-voltage to charger batter by internal MOSFET .It can deliver up to 800mA of charge

current .No blocking diode or external current sense resistor is required. HM4055 include one Open-Drain charge

status Pin: Charge status indicator

CHRG

The internal thermal regulation circuit reduces the programmed charge current if the die temperature attempts to

rise above a preset value of approximately 145℃. This feature protects the HM4055 from excessive temperature,

and allows the user to push the limits of the power handling capability of a given circuit board without risk of

damaging the HM4055 or the external components. Another benefit of adopting thermal regulation is that charge

current can be set according to typical, not worst-case, ambient temperatures for a given application with the

assurance that the charger will automatically reduce the current in worst-case conditions.

The charge cycle begins when the voltage at the V_CCpin rises above the UVLO level, a current set resistor is

connected from the PROG pin to ground. TheCHRG pin outputs a logic low to indicate that the charge cycle is on

going. At the beginning of the charge cycle, if the battery voltage is below 2.9V, the charge is in precharge mode to

bring the cell voltage up to a safe level for charging. The charger goes into the fast charge constant-current mode

once the voltage on the BAT pin rises above 2.9 V. In constant current mode, the charge current is set by R_PROG

When the battery approaches the regulation voltage 4.2V, the charge current begins to decrease as the HM4055

enters the constant-voltage mode. When the current drops to charge termination threshold, the charge cycle is

terminated, andCHRG

pin assumes a high impedance state to indicate that the charge cycle is terminated . The

charge termination threshold is 10% of the current in constant current mode. To restart the charge cycle, remove the

input voltage and reapply it . The charge cycle can also be automatically restarted if the BAT pin voltage falls below

the recharge threshold. The on-chip reference voltage, error amplifier and the resistor divider provide regulation

voltage with 1% accuracy which can meet the requirement of lithium-ion and lithium polymer batteries. When the

input voltage is not present, or input voltage is below V_BAT, the charger goes into a sleep mode, dropping battery

drain current to less than 2μA. This greatly reduces the current drain on the battery and increases the standby time.

The charging profile is shown in the following figure:

Page 8

HM4055A

Constant

Precharg

phase

――Charge current

Current phase

voltage phase

——Battery voltage

4.34V

4.2V

2.9V

Charge terminated

Programming charge current

The charge current is programmed using a single resistor from the PROG pin to ground. The program resistor

and the charge current are calculated using the following equations.:

1100

R_PROG

（error 10%）

I_BAT

In application, according the charge current to determine R_{PROG ,}the relation between R_PROGand charge current

can reference the following chart:

I_BAT(mA)

R_PROG(KΩ)

0.9

0.75

0.8

0.9

114

305

650

1000

1.7

1.1

Note:

a. K is the coefficient of variation, It generally is 1, but due to the vary operating environment, K is varied in the

range: 0.8~1.4

b. The up form is just for reference, it will varied ±10% according to the heat dissipation of the using PCB board;

c. The footprint copper pads should be as wide as possible and expand out to larger copper areas to spread and

dissipate the heat to the surrounding ambient.

Charge termination

A charge cycle is terminated when the charge current falls to 1/10^ththe programmed value after the final float

voltage is reached. This condition is detected by using an internal filtered comparator to monitor the PROG pin.

When the PROG pin voltage falls below 100mV for longer than t_TEMP(typically 1.8mS), Charging is terminated. The

charge current is latched off and the HM4055-N enters standby mode, where the input supply current drops to 55μA

Page 9

HM4055A

(Note:C/10 termination is disabled in trickle charging and thermal limiting modes).

When charging, transient loads on the BAT pin can cause the PROG pin to fall below 100mV for short periods

of time before the DC charge current has dropped to 1/10^ththe programmed value. The 1.8mS filter time (t_TEMP) on

the termination comparator ensures that transient loads of this nature do not result in premature charge cycle

termination. Once the average charge current drops below 1/10^ththe programmed value, the HM4055 terminated

the charge cycle and ceases to provide any current through the BAT pin. In this state all loads on the BAT pin must

be supplied by the battery.

The HM4055 constantly monitors the BAT pin voltage in standby mode. If this voltage drops below the 4.02V

recharge threshold (V_RECHRG),another charge cycle begins and current is once again supplied to the battery. To

manually restart a charge cycle when in standby mode, the input voltage must be removed and reapplied or the

charger must be shut down and restarted using the PROG pin. Figure 1 shows the state diagram of a typical charge

cycle.

Charge Status Indicator (CHRG)

HM4055 has one open-drain status indicator output CHRG.

CHRG is pull-down when the HM4055 in a

charge cycle. In other statusCHRG in high impedance.

Represent in failure state, when the charger with no battery: LED don’t light. If battery is not connected to

charger,CHRG pin outputs a PWM level to indicate no battery. If BAT pin connects a 10μF capacitor, the frequency

ofCHRG flicker about 1-4S, If not use status indicator should set status indicator output connected to GND.

Thermal limiting

An internal thermal feedback loop reduces the programmed charge current if the die temperature attempts to

rise above a preset value of approximately 110℃ . The feature protects the HM4055 from excessive temperature

and allows the user to push the limits of the power handling capability of a given circuit board without risk of

damaging the HM4055. The charge current can be set according to typical (not worst-case) ambient temperature

with the assurance that the charger will automatically reduce the current in worst-case conditions.

Under Voltage lockout (UVLO)

An internal under voltage lockout circuit monitors the input voltage and keeps the charger in shutdown mode

until VCC rises above the under voltage lockout threshold . If the UVLO comparator is tripped, the charger will not

come out of shutdown mode until VCC rises 140mV above the battery voltage.

Manual terminate

At any time of the cycle of charging will put the HM4055 into disable mode to remove RPROG（PROG pin is

float）. This made the battery drain current to less than 2μA and reducing the supply current to 55μA. To restart the

charge cycle, connect a programming resistor.

If HM4055 in the under voltage Lockout mode, the CHRG is in high impedance state, or VCC is above BAT

pin 140mV, or VCC is too low.

Auto restart

Once charge is been terminated, HM4055 immediately use a 1.8ms filter time （ t

）on the

RECHARGE

Page 10

HM4055A

termination comparator to constant monitor the voltage on BAT pin. If this voltage drops below the 4.02V recharge

threshold (about between 80% and 90% of V_CC), another charge cycle begins. This ensured the battery maintained

(or approach) to a charge full status and avoid the requirement of restarting the periodic charging cycle. In the

recharge cycle,

CHRG

pin enters a pulled down status.

Shutdown mode

Vdd<Vuvlo (3.7V)

Vdd<Vbat

CHRG=High impedance

Vbat<2.9V

Trickle charge mode

Charge current=1/10^thIbat

CHRG=strong pull-down

Vbat>2.9V

CC charge mode

Charge current=Ibat

CHRG=strong pull-down

Vbat=4.2V

CV charge mode

Charge voltage=4.2V

CHRG=strong pull-down

Charge current

<10%Ibat

HM4055

Standby mode

No charge current

CHRG=High impedance

Fig.1 State diagram of a typical charge cycle

Fig.2 Isolating with capacitive load on PROG Pin

Stability Considerations

In constant-current mode, the PROG pin is in the feedback loop, not the battery. The constant-current mode

stability is affected by the impedance at the PROG pin. With no additional capacitance on the PROG pin, the charger

is stable with program resistor values as high as 20KΩ. However, additional capacitance on this node reduces the

maximum allowed program resistor. Therefore, if I_PROGpin is loaded with a capacitance C, the following equation

should be used to calculate the maximum resistance value for R_PROG

：

Page 11

HM4055A

R_PROG



210⁵C_PROG

As user, may think charge current is important, not instantaneous current. For example, to run a low current

mode switch power which parallel connected with battery, the average current from BAT pin usually importance to

instantaneous current. In this case, In order to measure average charge current or isolate capacitive load from I_PROG

pin, a simple RC filter can be used on PROG pin as shown in Figure 2. In order to ensure the stability add a 10KΩ

resistor between PROG pin and filter capacitor.

Power dissipation

The conditions that cause the HM4055 to reduce charge current through thermal feedback can be

approximated by considering the power dissipated in the IC. Nearly all of this power dissipation is generated by the

internal MOSFET-this is calculated to be approximately:

P_D(V_CCV_BAT) X I _BAT

The approximate ambient temperature at which the thermal feedback begins to protect the IC is:

T_A110C P_D_JA; T_A110C (V_CCV_BAT) X I_BATX _JA

For example: The HM4055 with 5V supply voltage through programmable provides full limiting current 800mA

to a charge lithium-ion battery with 3.75V voltage

_JAis 150℃/W ( reference to PCB layout considerations), When

HM4055 begins to decrease the charge current, the ambient temperature about:

T_A110C (5V3.75V ) X (800mA) χ150C / W

T_A110C 

X 150C / W 110C 75C T_A=35C

HM4055 can work in the condition of the temperature is above 35℃, but the charge current will pull down to

below 800mA. In a fixed ambient temperature, the charge current is calculated to be approximately :

110℃- T_A

(VCC- V_BAT)*θ_JA

I_BAT

Just as Description of the Principle part talks about so, the current on PROG pin will reduce in proportion to the

reduced charge current through thermal feedback. In HM4055 design applications don’t need to considerate the

worst case of thermal condition, this point is importance, because if the junction temperature up to 110℃ ,IC will auto

reduce the power dissipation.

Thermal considerations

Because of the small size of the thin SOT23-5 package, it is important to use a good thermal PC board layout to

maximize the available charge current. The thermal path for the heat generated by the IC is from the die to the

copper lead frame, through the package leads, (especially the ground lead) to the PC board copper. The PC board

copper is the heat sink. The footprint copper pads should be as wide as possible and expand out to larger copper

areas to spread and dissipate the heat to the surrounding ambient. Other heat sources on the board, not related to

the charger, must also be considered when designing a PC board layout because they will affect overall temperature

rise and the maximum charge current.

Add thermal regulation current

It will effective to decrease the power dissipation through reduce the voltage of both ends of the inner MOSFET.

Page 12

HM4055A

In the thermal regulation, this action of transporting current to battery will raise. One of the measure is through an

external component(as a resistor or diode) to consume some power dissipation.

For example: The HM4055 with 5V supply voltage through programmable provides full limiting current 800mA

to a charge lithium-ion battery with 3.75V voltage. If _JAis 105℃/W, so that at 25℃ ambient temperature, the charge

current is calculated to be approximately :

110℃-25℃

(Vs-I_BAT*Rcc - V_BAT)*θ_JA

I_BAT

In order to increase the thermal regulation charge current, can decrease the power dissipation of the IC through

reducing the voltage (as show fig.3) of both two ends of the resistor which connecting in series with a 5V AC adapter.

With square equation to calculate I_BAT

：

4Rcc(110℃- T_A)

(Vs- V_BAT)- (Vs- V_BAT)²-

2Rcc

Θ_JA

I_BAT

If R_CC=0.25Ω, V_S=5V, V_BAT=3.75V, T_A=25℃ and _JA=105℃/W, we can calculate the thermal regulation charge

current: I_BAT＝764mA. It means that in this structure it can output 800mA full limiting charge current at more high

ambient temperature environment.

Although it can transport more energy and reduce the charge time in this application, but actually spread charge

time, if HM4055 stay in under-voltage state, when V_CCbecomes too low in voltage mode. Fig.4 shows how the

voltage reduced with increase R_CCvalue in this circuit. This technique will act the best function when in order to

maintain the minimize the dimension of the components and avoid voltage decreased to minimize R_CC

HM4055

Fig.3:A circuit to maximum the thermal

regulation charge current

Fig.4:The relationship curve between charge

current with R_CC

VCC bypass capacitor

Many types of capacitors can be used for input bypassing, however, caution must be exercised when using

multilayer ceramic capacitors. Because of the self-resonant and high Q characteristics of some types of ceramic

capacitors, high voltage transients can be generated under some start-up conditions, such as connecting the charger

input to a live power source. Adding a 1.5Ω resistor in series with a ceramic capacitor will minimize start-up voltage

Page 13

HM4055A

transients.

Charging Current Soft Start

HM4055 includes a soft start circuit which used to maximize to reduce the surge current in the begging of

charge cycle. When restart a new charge cycle, the charging current ramps up from 0 to the full charging current

within 20μs. In the start process it can maximize to reduce the action which caused by surge current load.

USB and Wall Adapter Power

HM4055 allows charging from a USB port, a wall adapter can also be used to charge Li-Ion/Li-polymer

batteries. Figure 5 shows an example of how to combine wall adapter and USB power inputs. A P-channel MOSFET,

M1, is used to prevent back conducting into the USB port when a wall adapter is present and Schottky diode, D1, is

used to prevent USB power loss through the 1KΩ pull-down resistor.

Fig.5:Combining Wall Adapter and USB Power

Generally, AC adaptor is able to provide bigger much current than the value of specific current limiting which is

500mA for USB port. So can rise charge current to 600mA with using a N-MOSFET (MN1) and an additional set

resistor value as high as 10KΩ.

Board Layout Considerations



RPROG at PROG pin should be as close to HM4055 as possible, also the parasitic capacitance at PROG pin

should be kept as small as possible.



The capacitance at VCC pin and BAT pin should be as close to HM4055 as possible.

It is very important to use a good thermal PC board layout to maximize charging current. The thermal path for

the heat generated by the IC is from the die to the copper lead frame through the package lead (especially the

ground lead) to the PC board copper, the PC board copper is the heat sink. The footprint copper pads should be

as wide as possible and expand out to larger copper areas to spread and dissipate the heat to the surrounding

ambient. Feed through vias to inner or backside copper layers are also useful in improving the overall thermal

performance of the charger. Other heat sources on the board, not related to the charger, must also be

considered when designing a PC board layout because they will affect overall temperature rise and the

maximum charge current.



The ability to deliver maximum charge current under all conditions require that the exposed metal pad on the

back side of the HM4055 package be soldered to the PC board ground. Failure to make the thermal contact

between the exposed pad on the backside of the package and the copper board will result in larger thermal

resistance.

Page 14

HM4055A

Package Information

 Package Type：SOT23-5

Millimeters

Inches

DIM

Min

1.05

Max

1.45

0.15

1.3

Min

Max

0.0413

0.0000

0.0354

0.0236

0.0098

0.0039

0.1110

0.0571

0.0059

0.0512

0.0276

0.0197

0.0091

0.1201

0.9

0.6

0.7

0.25

0.1

0.5

0.23

3.05

2.82

1.9(TYP)

0.0748(TYP)

2.6

1.5

3.05

1.75

0.1024

0.0512

0.1201

0.0689

0.95(TYP)

0.59(TYP)

0.2(TYP)

0.0374(TYP)

0.0232(TYP)

0.0079(TYP)

0.25

0.6

8°

0.0098

0.0000

0.0236

8°

Page 15

HM4055A

 Package Type：DFN2*2-6

Millimeters

Inches

DIM

Min

0.7

Max

0.8

Min

0.0276

Max

0.0315

0.002

0.05

0.203(TYP)

0.65(TYP)

0.008(TYP)

0.2

1.9

0.5

0.35

2.1

0.0078

0.0748

0.0197

0.0138

0.0827

0.0354

2.1

0.9

0.0256(TYP)

0.25

0.2

0.426

一

0.0098

0.0079

0.0393

0.0168

一

1.45

0.0571

Page 16

HM4055DDR [HMSEMI]

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SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E