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參數(shù)資料
| 型號(hào)： | TEA1612T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | 7.50 MM, PLASTIC, MS-013, SOT137-1, SOP-24 |
| 文件頁數(shù)： | 17/19頁 |
| 文件大?。?/td> | 108K |
| 代理商： | TEA1612T |
TEA1612T_1
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 24 September 2009
7 of 19
NXP Semiconductors
TEA1612T
Zero voltage switching resonant converter controller
The Rf(min) resistor has a voltage drop of 2.4 V and its resistance denes the minimum
charge current (rising slope) of the Cf capacitor if the control current is zero. The minimum
frequency is dened by this minimum charge current (IIRS1) and the discharge current:
7.5 Maximum frequency resistor
The output voltage is regulated by changing the frequency of the half-bridge converter.
The maximum frequency is determined by the Rf resistor which is connected between
the error amplier output VCO and the oscillator current input pin IRS. The current that
ows through the Rf resistor (IIRS2) is added to the current owing through the Rf(min)
resistor. As a result, the charge current ICF increases and the oscillation frequency
increases. As the falling slope of the oscillator is constant, the relationship between the
output frequency and the charge current is not a linear function (see Figure 6 and
The maximum output voltage of the error amplier and the value of Rf determine the
maximum frequency:
I
IRS1
2.4V
R
fmin
()
-----------------
=
t
IRS1
C
f
V
Cf
×
2I
IRS1
×
--------------------------
=
f
osc min
()
1
t
no
t
IRS1
+
-------------------------
=
f
bridge min
()
f
osc min
()
2
---------------------
=
I
IRS2
V
VCO
0.6
–
Rf
---------------------------
=
t
IRS2
C
f
V
Cf
×
2I
IRS1
I
IRS2
+
()
×
---------------------------------------------
=
I
IRS2 max
()
V
VCO max
()
0.6
–
Rf
---------------------------------------
=
t
IRS min
()
C
f
V
Cf
×
2I
IRS2
I
IRS2 max
()
+
()
×
---------------------------------------------------------
=
f
osc max
()
1
T
OSC
-------------
=
f
bridge max
()
f
osc max
()
2
----------------------
=
T
OSC
t
IRS min
()
t
IFS
+
=
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| TEA1622P | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:STARplugTM |
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