tea1733p NXP Semiconductors, tea1733p Datasheet - Page 14

• Manufacturer Part Number: tea1733p
• Description: Greenchip Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 5.
T
the IC; unless otherwise specified.
[1]
11. Application information
TEA1733P
Product data sheet
Symbol
R
Driver (pin DRIVER)
I
I
V
Temperature protection
T
source(DRIVER)
sink(DRIVER)
amb
pl(IC)
O(DRIVER)max
start(soft)
The clamp voltage on the PROTECT pin is lowered when the IC is in power-down (latched or restart protection).
= 25
°
C; V
Characteristics
CC
= 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
Parameter
soft start resistance
source current on pin
DRIVER
sink current on pin
DRIVER
maximum output voltage
on pin DRIVER
IC protection level
temperature
A power supply with the TEA1733P is a flyback converter operating in Continuous
conduction mode (See
Capacitor C5 buffers the IC supply voltage, which is powered via resistor R3 at start-up
and via the auxiliary winding during normal operation. Sense resistor R9 converts the
current through the MOSFET S1 into a voltage on pin ISENSE. The value of R9 defines
the maximum primary peak current on MOSFET S1. Resistor R7 reduces the peak
current to capacitor C5.
In the example shown in
OVP level is set by diode Z1 to V
Temperature Coefficient (NTC) resistor R4. The VINSENSE pin is used for mains voltage
detection and resistors R1 and R2 set the start voltage to about 80 V (AC). The overpower
protection time is defined by capacitor C4 is set at 60 ms.
The restart time is defined by capacitor C4 and resistor R8 at 0.5 s.
Resistor R6 and capacitor C6 define the soft start time. Resistor R5 prevents the soft start
capacitor C6 from being charged during normal operation caused by negative voltage
spikes across the current sense resistor R9.
Capacitor C3 reduces noise on the CTRL pin.
…continued
All information provided in this document is subject to legal disclaimers.
Conditions
V
V
V
DRIVER
DRIVER
DRIVER
Rev. 6 — 15 February 2011
Figure
Figure
= 2 V
= 2 V
= 10 V
10).
10, the PROTECT pin is used for OVP and OTP. The
CC
= 25.8 V. The OTP level is set by Negative
Min
12
-
0.25
0.6
9
130
Typ
-
−0.3
0.3
0.75
10.5
140
GreenChip SMPS control IC
TEA1733P
© NXP B.V. 2011. All rights reserved.
Max
-
−0.25
-
-
12
150
Unit
kΩ
A
A
A
V
°C
14 of 20