?SENSOR 720P/1080P靜電保護(hù)方案
SENSOR 720P/1080P靜電保護(hù)方案
方案簡(jiǎn)介
SENSOR 720P/1080P,即高清傳感器,是攝像機(jī)的核心部件,負(fù)責(zé)將光信號(hào)轉(zhuǎn)換成電信號(hào),以便進(jìn)行后續(xù)的處理和存儲(chǔ),廣泛應(yīng)用于安防監(jiān)控和行車記錄儀領(lǐng)域。Sensor的分辨率是一個(gè)重要的參數(shù),它決定了攝像機(jī)能夠捕捉到的圖像細(xì)節(jié)程度,720p Sensor的分辨率為1280x720像素,1080p,也稱為Full HD(全高清),其分辨率為1920x1080像素。這些傳感器中的攝像頭線路通常采用并聯(lián)方式連接至地線,以確保信號(hào)的穩(wěn)定性和安全性。
靜電可能通過直接接觸或間接感應(yīng)的方式進(jìn)入傳感器,導(dǎo)致內(nèi)部電路短路或損壞。所以芯片端口部分設(shè)計(jì)時(shí)應(yīng)充分考慮對(duì)傳感器的靜電保護(hù),以防止因過電、過流等異常情況對(duì)芯片造成損害,確保在各種環(huán)境下都能穩(wěn)定可靠地工作。靜芯微系列產(chǎn)品可以充分滿足客戶的設(shè)計(jì)要求。
應(yīng)用示例
SENSOR 720P
對(duì)于SENSOR 720P的靜電防護(hù),我們推薦采用集成式和分立式兩種ESD保護(hù)方案。分立器件減少了生產(chǎn)成本,集成式器件的流通式封裝設(shè)計(jì)簡(jiǎn)化了 PCB 布局,減少布線過程中的不連續(xù)性,促進(jìn)了信號(hào)完整性和系統(tǒng)穩(wěn)定性的提升??蛻艨筛鶕?jù)實(shí)際情況進(jìn)行選擇。
方案一:
方案一中我們采用四引腳集成式ESD保護(hù)器件,型號(hào)為SELC143T5V2UB, 工作電壓為5V,鉗位電壓為13V,符合IEC 61000-4-2 (ESD) 規(guī)范,在 ±15kV(空氣)和±15kV(接觸)下提供瞬變保護(hù)。
規(guī)格型號(hào) |
方向 |
工作電壓(V) |
IPP(A) |
鉗位電壓(V) |
結(jié)電容(pF) |
封裝 |
SELC143T5V2UB |
Uni. |
5 |
5 |
13 |
0.6/0.3 |
SOT-143 |
方案二:
方案二中我們使用雙向單通道分立式ESD保護(hù)器件分別保護(hù)電源、時(shí)鐘和數(shù)據(jù)三條通道,推薦的器件型號(hào)如下表所示。
規(guī)格型號(hào) |
方向 |
工作電壓(V) |
IPP(A) |
鉗位電壓(V) |
結(jié)電容(pF) |
封裝 |
SELC3D5V1BC |
Bi |
5 |
6 |
12 |
1 |
SOD323 |
SENC5D5V1BA |
Bi |
5 |
8 |
8.5 |
15 |
SOD523 |
SENC2F5V1B |
Bi |
5 |
4.5 |
15 |
3.5 |
DFN1006-2L |
SENC2X5V1BA |
Bi |
5 |
10 |
10 |
12 |
DFN0603-2L |
SENSOR 1080P
方案一:
方案一中我們采用十引腳集成式ESD保護(hù)器件,型號(hào)為SEUC10F5V4UB, 工作電壓為5V,鉗位電壓為12V,符合IEC 61000-4-2 (ESD) 規(guī)范,在 ±25kV(空氣)和±20kV(接觸)下提供瞬變保護(hù)。
規(guī)格型號(hào) |
方向 |
工作電壓(V) |
IPP(A) |
鉗位電壓(V) |
結(jié)電容(pF) |
封裝 |
SEUC10F5V4UB |
Uni. |
5 |
3 |
12 |
0.4/0.2 |
DFN2510-10L |
方案二:
方案二中我們使用雙向單通道分立式ESD保護(hù)器件分別保護(hù)12路通道,推薦的器件型號(hào)如下表所示。
規(guī)格型號(hào) |
方向 |
工作電壓(V) |
IPP(A) |
鉗位電壓(V) |
結(jié)電容(pF) |
封裝 |
SELC2F3V1B |
Bi |
3.3 |
4 |
18 |
0.3 |
DFN1006-2L |
SELC2X5V1B |
Bi |
5 |
4 |
20 |
0.3 |
SOD523 |
電氣特性表
At TA = 25℃ unless otherwise noted
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
6.0 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
9.0 |
11.0 |
V |
|
Clamping Voltage |
VC |
IPP=5A; tp=8/20us |
13.0 |
15.0 |
V |
|
Junction Capacitance |
CJ |
VR=0V; f=1MHz I/O pin to I/O pin |
0.3 |
0.4 |
pF |
|
Junction Capacitance |
CJ |
VR=0V; f=1MHz I/O pin to GND |
0.6 |
0.8 |
pF |
表1 SELC143T5V2UB電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
7.0 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5.0V |
1 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
8.5 |
V |
||
Clamping Voltage |
VC |
IPP=6A; tp=8/20us |
12 |
V |
||
Junction Capacitance |
CJ |
I/O to GND; VR=0V; f=1MHz |
1 |
pF |
表2 SELC3D5V1BC電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
5.8 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
7.0 |
8.0 |
V |
|
Clamping Voltage |
VC |
IPP=8A; tp=8/20us |
8.5 |
10.0 |
V |
|
Junction Capacitance |
CJ |
I/O to I/O; VR=0V; f=1MHz |
15 |
20 |
pF |
表3 SENC5D5V1BA電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
6.0 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
10.0 |
12.0 |
V |
|
Clamping Voltage |
VC |
IPP=4.5A; tp=8/20us |
15.0 |
18.0 |
V |
|
Junction Capacitance |
CJ |
VR=0V; f=1MHz |
3.5 |
5.0 |
pF |
表4 SENC2F5V1B電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
5.6 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
8.0 |
10.0 |
V |
|
Clamping Voltage |
VC |
IPP=10A; tp=8/20us |
10.0 |
12.0 |
V |
|
Junction Capacitance |
CJ |
I/O to GND; VR=0V; f=1MHz |
12 |
20 |
pF |
表5 SENC2X5V1BA電氣特性表
Parameters |
Symbol |
conditions |
Min. |
Typ. |
Max. |
Unit |
Reverse stand-off voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT= 1mA |
6.0 |
7.5 |
8.5 |
V |
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VCL |
IPP=1A; TP=8/20us |
9.0 |
11.0 |
V |
|
Clamping Voltage |
VCL |
IPP=3A; TP=8/20us |
12.0 |
15.0 |
||
Junction capacitance |
CJ |
I/O pins to ground; VR=0V; f = 1MHz |
0.4 |
0.5 |
pF |
|
Between I/O pins; VR=0V; f = 1MHz |
0.2 |
0.25 |
表6 SEUC10F5V4UB電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
3.3 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
4.5 |
V |
||
Reverse Leakage Current |
IR |
VRWM=3.3V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
10.0 |
12.0 |
V |
|
Clamping Voltage |
VC |
IPP=4A; tp=8/20us |
16.0 |
20.0 |
V |
|
Junction Capacitance |
CJ |
I/O to GND; VR=0V; f=1MHz |
0.3 |
0.5 |
pF |
表7 SELC2F3V1B電氣特性表
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Units |
Reverse Stand-off Voltage |
VRWM |
5.0 |
V |
|||
Reverse Breakdown Voltage |
VBR |
IT=1mA |
6.0 |
V |
||
Reverse Leakage Current |
IR |
VRWM=5V |
1.0 |
uA |
||
Clamping Voltage |
VC |
IPP=1A; tp=8/20us |
11.0 |
14.0 |
V |
|
Clamping Voltage |
VC |
IPP=4A; tp=8/20us |
20.0 |
24.0 |
V |
|
Junction Capacitance |
CJ |
VR=0V; f=1MHz |
0.3 |
0.4 |
pF |
表8 SELC2X5V1B電氣特性表
總結(jié)與結(jié)論
隨著科技的不斷發(fā)展,高清化已成為電子產(chǎn)品的重要發(fā)展趨勢(shì)。SENSOR 720p/1080p作為高清顯示的關(guān)鍵部件,保護(hù)其免受ESD靜電損害對(duì)于系統(tǒng)的穩(wěn)定運(yùn)行至關(guān)重要。ELECSUPER SEMI研發(fā)各種等級(jí)電容的ESD和TVS保護(hù)器件,可按照客戶需求性能與封裝提供定制化開發(fā)服務(wù),為各種接口及通信線路提供值得信賴的保護(hù)器件。以上解決方案是保護(hù)SENSOR 720p/1080p免受靜電干擾的優(yōu)選之策,確保高清顯示系統(tǒng)的有序與穩(wěn)定。
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