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TEA1832TS/1X

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
TEA1832TS All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 16 December 2014 16 of 23
NXP Semiconductors
TEA1832TS
GreenChip SMPS control IC
N
cy(dmax)
number of switching
cycles with maximum
duty cycle
7-8
V
start(red)f
frequency reduction
start voltage
pin CTRL dropping to low
power
1.5 1.8 2.1 V
V
start(incr)f
frequency increase
start voltage
pin CTRL 2.6 2.9 3.2 V
V
M(f)max
maximum frequency
peak voltage
pin CTRL 4.2 4.5 4.8 V
V
(zero)
zero duty cycle
voltage
pin CTRL 1.15 1.45 1.75 V
Overpower protection
t
to(opp)
overpower protection
time-out time
20.5 27.5 34.5 ms
Current sense and overpower compensation (pin ISENSE)
V
sense(max)
maximum sense
voltage
V/t = 0 V/s 0.555 0.590 0.625 V
t
PD(sense)
sense propagation
delay
130 155 180 ns
V
th(sense)opp
overpower protection
sense threshold
voltage
370 400 430 mV
V
ISENSE
/t slope compensation
voltage on pin
ISENSE
high-power mode - 18 - mV/s
t
leb
leading edge
blanking time
275 325 375 ns
I
opc(ISENSE)
overpower
compensation
current on pin
ISENSE
I
PROTECT
=10A;
V
ctrl(Ipeak)
> 400 mV
1.5 2 2.5 A
I
PROTECT
=18A;
V
ctrl(Ipeak)
> 400 mV
5.5 6 6.5 A
Soft start (pin ISENSE)
t
start(soft)
soft start time 2.7 3.5 4.2 ms
Driver (pin DRIVER)
I
source(DRIVER)
source current on pin
DRIVER
V
DRIVER
=2V - 0.3 0.25 A
I
sink(DRIVER)
sink current on pin
DRIVER
V
DRIVER
= 2 V 0.25 0.3 - A
V
DRIVER
=10V 0.6 0.75 - A
V
O(DRIVER)max
maximum output
voltage on pin
DRIVER
910.512V
Overvoltage protection (pins VCC and ISENSE)
V
ovp(VCC)
overvoltage
protection voltage on
pin VCC
34.8 36 37.2 V
Table 5. Characteristics …continued
T
amb
=25
C; V
CC
= 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
TEA1832TS All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 16 December 2014 17 of 23
NXP Semiconductors
TEA1832TS
GreenChip SMPS control IC
[1] Guaranteed by design.
[2] The clamp voltage on the PROTECT pin is lowered when the IC is in Power-down mode. (latched or restart protection).
[3] The Output Short Circuit Protection (OSCP) is only enabled when the voltage level on the ISENSE pin during the secondary stroke is
below V
dis(oscp)ISENSE
level (half the V
ovp(ISENSE)
level). When enabled, the OSCP becomes active when the V
sense
level exceeds
V
th(sense)opp
and the V
sense
level is reached within 1 s (cycle-by-cycle). The switching period is then stretched to 28 s (36 kHz, f
osc
OSCP).
V
ovp(ISENSE)
overvoltage
protection voltage on
pin ISENSE
2.4 2.5 2.6 V
t
blank(ovp)ISENSE
overvoltage
protection blanking
time on pin ISENSE
1.7 2.1 2.5 s
N
cy(ovp)
number of
overvoltage
protection cycles
444
Output short circuit protection
V
dis(oscp)ISENSE
output short circuit
protection disable
voltage on pin
ISENSE
OSCP is disabled when
V
ISENSE
exceeds
V
dis(oscp)ISENSE
1.2 1.25 1.3 V
t
to(oscp)
output short circuit
protection time-out
time
10 14.5 19 ms
Temperature protection
T
pl(IC)
IC protection level
temperature
130 140 150 C
Table 5. Characteristics
…continued
T
amb
=25
C; V
CC
= 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
TEA1832TS All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 16 December 2014 18 of 23
NXP Semiconductors
TEA1832TS
GreenChip SMPS control IC
11. Application information
A power supply with the TEA1832TS is a flyback converter which operates in both
Discontinuous Conduction Mode (DCM) and Continuous Conduction Mode (CCM). Which
mode depends on the input voltage and output power.
Resistor R1 charges the small buffer capacitor C3 at start-up. The auxiliary winding takes
over during normal operation.
The driver pin switches the MOSFET. Resistor R4 is added to protect the driver against
switching spikes due to parasitics (inductance and capacitance of tracks, MOSFET, and
transformer).
Resistor R6 converts the MOSFET current to a voltage. It is measured on the ISENSE pin.
The R6 value determines the maximum primary peak current through the MOSFET.
The measured peak current is compensated for the mains input voltage using a current
through resistor R3 that is proportional to the bus voltage of capacitor C1. During the
secondary stroke, the auxiliary voltage is measured using diode D4 and resistors R5, R3,
and R6. The measured value can be used for an overvoltage protection for the output
voltage.
Place capacitor C2 close to the CTRL pin to suppress noise.
The PROTECT pin cycles between mains voltage detect and external overtemperature
measurement. During mains voltage detection, the current through resistor R8 is
measured. This current relates to the voltage on capacitor C1 and the input voltage. The
current is used to realize brownin, brownout, and input voltage compensation for the
overpower protection.
During overtemperature protection, a current is sourced from the pin. The voltage over
diode D5 and NTC resistor R2 is measured. A fixed comparator level detects when the
NTC value drops too much.
To avoid pickup of disturbance, place both resistor R8 and diode D5/resistor R2 as close
as possible to the pin.
Fig 14. TEA1832TS application diagram
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P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

TEA1832TS/1X

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Manufacturer:
NXP Semiconductors
Description:
AC/DC Converters GreenChip SMPS control IC
Lifecycle:
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