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參數資料
| 型號： | SSL4101DB01 |
| 廠商： | NXP Semiconductors N.V. |
| 中文描述： | Demoboard description Demobox content SSL4101DB01 Reference design, CD with documentation |
| 文件頁數： | 7/11頁 |
| 文件大?。?/td> | 103K |
| 代理商： | SSL4101DB01 |
AN10580_1
NXP B.V. 2008. All rights reserved.
Application note
Rev. 01 — 19 March 2008
7 of 11
NXP Semiconductors
AN10580
GreenChip TEA1761 SR and feedback controller
3.7 Driver output
Between 0 V and UVLO, an active current sink circuit keeps the external MOSFET(s) in
an off-state.
3.8 Internal OverTemperature Protection (OTP)
The TEA1761 has an internal OverTemperature Protection at 150
°
C. The IC will
maximize the OPTO sink current at the moment the OTP level has been reached. This will
limit (or shut down) the output power of the primary side controller.
4.
Application examples
4.1 Using the TEA1761 with a 3.3 V or 5 V output
The TEA1761 has a start level of 8.6 V (typical). An extra secondary winding must be
used to supply the IC when using the TEA1761 for a 3.3 V or 5 V output.
Figure 3
gives the configuration of such a circuit.
In some cases, where the nominal output voltage is close to V
startup
, the extra supply
winding could be necessary for proper output current limiting behavior.
5.
Meeting EMC requirements
In some applications, it can be more difficult to meet the CISPR 22 requirements with the
synchronous rectification compared to a solution with Schottky diodes. This is caused by
the placing of the SR MOSFETs in the secondary ground path instead of the “normal”
placing of the Schottky diode in the positive voltage path. This problem is typical for this
topology. There are two ways to solve this problem without increasing the common mode
filtering.
5.1 The powered shield
Figure 4
shows the powered shield. In most transformer designs, the shielding between
the primary and secondary windings is already present. All the present shields must be
connected to an extra winding at the primary side. This winding injects a current into the
Fig 3.
V
CC
supply with a 3.3 V or 5 V output
TEA1761
15 V
3.3 V
V
CC
secondary
ground
V DC
prim
primary
ground
sec
014aaa053
10
μ
F
相關PDF資料 |
PDF描述 |
|---|---|
| SSTA | SURFACE MOUNT SUPER FAST RECTIFIERS |
| SSTB | SURFACE MOUNT SUPER FAST RECTIFIERS |
| SSTD | SURFACE MOUNT SUPER FAST RECTIFIERS |
| SSTE | SURFACE MOUNT SUPER FAST RECTIFIERS |
| SSTG | SURFACE MOUNT SUPER FAST RECTIFIERS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SSL4101DB01,598 | 制造商:NXP Semiconductors 功能描述:>91% EFF. PF>0.9 - Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:48V 150W Universal Ref des |
| SSL4101DB01598 | 制造商:NXP Semiconductors 功能描述:DEMO BOARD SSL4101 150W LED |
| SSL4101DB02,598 | 制造商:NXP Semiconductors 功能描述:COMBI OF 935295503598 AND 935295178598 IN SINGLE CASING - Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:4ch-1A-42V 150W SSL Ref des |
| SSL4101DB02598 | 制造商:NXP Semiconductors 功能描述:DEMO BOARD SSL4101 150W LED |
| SSL4101T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GreenChip III SMPS control IC Frequency limitation to reduce switching losses. |
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