TEA1612T/N1,518 NXP Semiconductors, TEA1612T/N1,518 Datasheet - Page 7

• Manufacturer Part Number: TEA1612T/N1,518
• Description: IC RESONANT CONV CTRLR 24SOIC
• Manufacturer: NXP Semiconductors

Specifications of TEA1612T/N1,518

• Applications: Resonant Converter Controller
• Voltage - Supply: 11 V ~ 13 V
• Current - Supply: 2mA
• Operating Temperature: -25°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 935286866518

NXP Semiconductors
TEA1612T_1
Product data sheet
7.5 Maximum frequency resistor
The R
charge current (rising slope) of the C
frequency is defined by this minimum charge current (I
The output voltage is regulated by changing the frequency of the half-bridge converter.
The maximum frequency is determined by the R
the error amplifier output VCO and the oscillator current input pin IRS. The current that
flows through the R
resistor. As a result, the charge current I
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
The maximum output voltage of the error amplifier and the value of R
maximum frequency:
I
t
I
t
I
t
T
f
f
f
f
IRS1
IRS2
IRS min
IRS1
IRS2
IRS2 max
osc min
bridge min
osc max
bridge max
OSC
=
=
=
=
f(min)
=
7):
C
--------------------------
-------------------------------------------- -
2
-----------------
V
-------------------------- -
R
t
=
2
=
IRS min
2.4V
=
f
VCO
f min
=
resistor has a voltage drop of 2.4 V and its resistance defines the minimum
-------------------------------------------------------- -
2
C
------------------------ -
t
R
=
------------ -
T
=
I
no
I
V
-------------------------------------- -
IRS1
f
IRS1
OSC
1
–
-------------------- -
f
V
VCO max
f
--------------------- -
+
f
osc min
0.6
I
1
osc max
Cf
t
IRS2
+
C
IRS1
+
2
V
2
R
t
f
I
IFS
Cf
f
IRS2
Rev. 01 — 24 September 2009
+
resistor (I
f
I
–
V
IRS2 max
0.6
Cf
IRS2
Zero voltage switching resonant converter controller
) is added to the current flowing through the R
f
capacitor if the control current is zero. The minimum
CF
increases and the oscillation frequency
f
resistor which is connected between
IRS1
) and the discharge current:
TEA1612T
Figure 6
f
© NXP B.V. 2009. All rights reserved.
determine the
and
f(min)
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