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UM10727
GreenChip TEA1708T automatic discharge for X capacitors
demo board
Rev. 1 — 3 October 2013
Document information
Info
Keywords
Abstract
Content
TEA1708T, APBADC073, discharge, X capacitor, SO8, low power
consumption, discharge current, surge protection, demo board
This user manual describes how the TEA1708T APBADC073 demo board
can be used in a power converter to add the automatic discharge for X
capacitor functionality. It also provides recommendations for integration of
the TEA1708T in a power adapter printed-circuit board. The demo board
contains a TEA1708T controller in SO8 package and two resistors and
one capacitor.
The APBADC073 demo board replaces the resistors that are normally
used to discharge the X capacitor. It can be connected directly across the
X capacitor terminals for evaluation purposes.
User manual
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Table of Contents
Related Manuals for NXP Semiconductors GreenChip TEA1708T
Summary of Contents for NXP Semiconductors GreenChip TEA1708T
- Page 1 UM10727 GreenChip TEA1708T automatic discharge for X capacitors demo board Rev. 1 — 3 October 2013 User manual Document information Info Content Keywords TEA1708T, APBADC073, discharge, X capacitor, SO8, low power consumption, discharge current, surge protection, demo board Abstract This user manual describes how the TEA1708T APBADC073 demo board can be used in a power converter to add the automatic discharge for X capacitor functionality.
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Page 2: Contact Information
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board Revision history Date Description 20131003 first issue Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com UM10727 All information provided in this document is subject to legal disclaimers. -
Page 3: Introduction
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board 1. Introduction WARNING Lethal voltage and fire ignition hazard The non-insulated high voltages that are present when operating this product, constitute a risk of electric shock, personal injury, death and/or ignition of fire. -
Page 4: Functional Description
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board 4. Functional description The TEA1708T is an automatic discharge IC for X capacitors. It has a low power consumption ( < 1 mW at 230 V (AC)). The X-capacitor discharge current is internally limited to 2.3 mA. -
Page 5: Connecting The Board
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board a. Front b. Back Fig 3. APBADC073 demo board 5.2 Connecting the board The APBADC073 demo board can be directly connected across the X capacitor terminals of the power supply. Either the original X capacitor of the power supply or the X capacitor of the board can be used. -
Page 6: Measurements
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board Figure 4 shows the board connections. Fig 4. APBADC073: Board connections 6. Measurements Tests have been carried out to measure the power consumption of the TEA1708T, to test the discharge capacity of the TEA1708T, and to test the surge capability. -
Page 7: Power Consumption
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board 6.2 Power consumption Test conditions: The APBADC073 demo board is connected to the AC source. The X capacitor must not be connected. For several AC voltages the power consumption is measured with the power meter set to the lowest current value (5 mA), integration time of 36 s, and readout in mWh. -
Page 8: Surge Capability
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board Table 3. Discharge time X capacitor value (nF) Discharge time (135 V) (ms) Discharge time (60 V) (ms) 1000 2000 1700 6.4 Surge capability Test conditions: • The APBADC073 demo board without the X capacitor is connected to the surge generator KeyTek EMCPro Plus •... -
Page 9: Schematic
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board 7. Schematic Fig 6. APBADC073 schematic diagram On the demo board, pin 1 (NC) and pin 2 (TMR2) are connected. Pin 3 (NC) and pin 4 (TMR1) are also connected. The reason for this is backward compatibility with earlier (test) versions of the TEA1708T. -
Page 10: Bill Of Material (Bom)
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board Fig 7. APBADC073 PCB layout 8. Bill Of Material (BOM) Table 6. Bill of materials APBADC073 demo board Reference Description and Part number Manufacturer values resistor; 200 k; 5 %;... -
Page 11: Legal Information
NXP Semiconductors. In no event shall NXP Semiconductors, its affiliates or their suppliers be liable In no event shall NXP Semiconductors be liable for any indirect, incidental, to customer for any special, indirect, consequential, punitive or incidental... -
Page 12: Table Of Contents
UM10727 NXP Semiconductors TEA1708T automatic discharge for X capacitors demo board 10. Contents Introduction ......3 Safety warnings . - Page 13 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: TEA1708DB1168UL...
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