TEA1733T_10_技术文档

TEA1733T; TEA1733LT

GreenChip III SMPS control IC

Rev. 02 — 26 March 2010

Product data sheet

1. General description

The TEA1733T and TEA1733LT are low cost Switched Mode Power Supply (SMPS)

controller ICs intended for flyback topologies. The TEA1733(L) operates in fixed

frequency mode. To reduce ElectroMagnetic Interference (EMI), frequency jitter has been

implemented. Slope compensation is integrated for Continuous Conduction Mode (CCM)

operation.

The TEA1733(L) IC incorporates OverPower Protection (OPP). This enables the

controller to operate under overpower situations for a limited amount of time.

Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input

UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output OVP and

OverTemperature Protection (OTP) can be implemented using a minimal number of

external components.

At low power levels, the primary peak current is set to 25 % of the maximum peak current

and the switching frequency is reduced to limit switching losses. The combination of fixed

frequency operation at high output power and frequency reduction at low output power

provides high-efficiency over the total load range.

The TEA1733(L) enables low cost, highly efficient and reliable supplies for power

requirements up to 75 W to be designed easily and with a minimum number of external

components.

2. Features and benefits

2.1 Features

SMPS controller IC enabling low-cost applications

Large input voltage range (12 V to 30 V)

Very low supply current during start-up and restart (typically 10 μA)

Low supply current during normal operation (typically 0.5 mA without load)

Overpower or high/low line compensation

Adjustable overpower time-out

Adjustable overpower restart timer

Fixed switching frequency with frequency jitter to reduce EMI

Frequency reduction with fixed minimum peak current to maintain high-efficiency at

low output power levels

Slope compensation for CCM operation

Low and adjustable OverCurrent Protection (OCP) trip level

Adjustable soft start operation

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

Two protection inputs (e.g. for input UVP and OVP, OTP and output OVP)

IC overtemperature protection

3. Applications

All applications requiring efficient and cost-effective power supply solutions to 75 W.

4. Ordering information

Table 1.

Ordering information

Type number

Package

Name

SO8

Description

Version

SOT96-1

TEA1733T

plastic small outline package; 8 leads; body width 3.9 mm

TEA1733LT

SO8

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

2 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

5. Block diagram

V

ctrl(Ipeak)

400 mV

VCCstart

VCCstop

11 μA

D

Q

21 V

12 V

8

1

OPTIMER

VCC

overpower

2.5 V

driver

22 V

6 V

OPP switch

latch reset

5 V

clamp

latch

TEMPERATURE

PROTECTION

OTP

2

GND

restart

5.4 V

set

max

OSCILLATOR

MODULATION

clamp

OPP switch

δ

7 kΩ

frequency reduction

RESTART

CONTROL

107 μA

7

ANALOG

CONTROL

SLOPE

COMPENSATION

OPTIMER

1.2 V / 4.5 V

CTRL

power down

V

ctrl(Ipeak)

DRV

S

R

set

prothigh

32

μA

3

VCCstop

overpower

highvin

restart

DRIVER

Q

stop

(1)

δ

S

max

0.50 V/0.80 V

6

PROTECT

lowvin

restart

Q

protlow

highvin

lowvin

107

μA

VCCstart

power down

lowvin

R

BLANK

protlow

soft start

55

μA

soft start

OTP

prothigh

latch

LEB

3.52 V

S

4

protlow

overpower

ISENSE

(1)

stop

V

ctrl(Ipeak)

OCP

0.72 V/0.94 V

R

latch reset

DIGITAL CONTROL

5

latch

VINSENSE

OVERPOWER

CORRECTION

VINSENSE

014aaa926

(1) In the TEA1733LT the Overpower signal switches the IC to the latched-off state. In the TEA1733T the Overpower signal triggers

the restart timer.

Fig 1. Block diagram

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

3 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

6. Pinning information

6.1 Pinning

1

2

3

4

8

7

6

5

VCC

GND

OPTIMER

CTRL

TEA1733T

DRIVER

ISENSE

PROTECT

VINSENSE

014aaa927

Fig 2. Pin configuration: TEA1733(L) (SOT96-1)

6.2 Pin description

Table 2.

Pin description

Symbol

VCC

1

Description

supply voltage

ground

GND

2

DRIVER

ISENSE

VINSENSE

PROTECT

CTRL

3

gate driver output

current sense input

4

5

input voltage protection input

general purpose protection input

control input

6

7

OPTIMER

8

overpower and restart timer

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

4 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

7. Functional description

7.1 General control

The TEA1733(L) contains a flyback circuit controller, a typical configuration of which is

shown in Figure 3.

C1

R1

C2

TEA1733T

R2

VINSENSE

PROTECT

ISENSE

DRIVER

GND

5

6

7

8

4

3

2

1

S1

R5

R3

R10

R4

CTRL

Θ

OPTIMER

R6

C6

VCC

Z1

C3

C4

R8

C5

R9

R7

014aaa928

Fig 3. Typical configuration

7.2 Start-up and UnderVoltage LockOut (UVLO)

Initially, the capacitor on the VCC pin is charged from the high voltage mains via resistor

R3.

If V_CCis lower than V_startup, the IC current consumption is low (typically 10 μA). When V_CC

reaches V_startup, the IC first waits for the VINSENSE pin to reach the V_{start(VINSENSE)}

voltage and PROTECT pin to reach the V_{det(PROTECT)(L)}voltage. When both levels are

reached, the IC charges the ISENSE pin to the V_start(soft)level and starts switching. In a

typical application the supply voltage is taken over by the auxiliary winding of the

transformer.

If a protection is triggered the controller stops switching. Depending on the protection

triggered and IC version (TEA1733T or TEA1733LT), the protection causes a restart or

latches the converter to an off-state.

A restart caused by a protection rapidly charges the OPTIMER pin to 4.5 V (typical). The

TEA1733(L) enters Power-down mode until the OPTIMER pin discharges down to 1.2 V

(typical). In Power-down mode, the IC consumes a very low supply current (10 μA typical)

and the VCC pin is clamped at 22 V (typical) by an internal clamp circuit. When the

voltage on pin OPTIMER drops below 1.2 V (typical) and the VCC pin voltage is above the

VCC start-up voltage (See Figure 4), the IC restarts.

When a latched protection is triggered, the TEA1733(L) immediately enters Power-down

mode. The VCC pin is clamped to a voltage just above the latch protection reset voltage

(V_rst(latch)+ 1 V).

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

5 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

V

startup

th(UVLO)

V

CC

soft start

ISENSE

V

det(H)(VINSENSE)

VINSENSE

V

det(H)(PROTECT)

det(L)(PROTECT)

PROTECT

OPTIMER

4.5 V

1.2 V

V

O

(power down)

protection

starting

converter

normal

operation

charging VCC

capacitor

restart

014aaa929

Fig 4. Start-up sequence, normal operation and restart sequence

When the voltage on pin VCC drops below the UVLO level during normal operation, the

controller stops switching and enters Restart mode. In Restart mode, the driver output is

disabled and the VCC pin voltage is recharged via resistor R3 to the rectified mains.

7.3 Supply management

All internal reference voltages are derived from a temperature compensated on-chip band

gap circuit. Internal reference currents are derived from a trimmed and temperature

compensated current reference circuit.

7.4 Input voltage detection (VINSENSE pin)

In a typical application, the mains input voltage can be detected by the VINSENSE pin.

Switching will not take place until the voltage on VINSENSE has reached the

V

_{start(VINSENSE)}voltage (typically 0.94 V).

When the VINSENSE voltage drops below V_{det(L)(VINSENSE)}(typically 0.72 V) or exceeds

_{det(H)(VINSENSE)}(typically 3.52 V), the converter stops switching and performs a restart.

V

If pin VINSENSE is left open or disconnected, the pin is pulled up by the internal 20 nA

(typical) current source to reach the V_{det(H)(VINSENSE)}level. This triggers restart protection.

An internal clamp of 5.2 V (typical) protects this pin from excessive voltages.

7.5 Protection input (PROTECT PIN)

Pin PROTECT is a general purpose input pin, which can be used to switch off the

converter (latched protection). The converter is stopped when the voltage on this pin is

pulled above V_{det(H)(PROTECT)}(typically 0.8 V) or below V_{det(L)(PROTECT)}(typically 0.5 V). A

current of 32 μA (typical) flows out of the chip when the pin voltage is at the

V

_{det(L)(PROTECT)}level. A current of 107 μA (typical) flows into the chip when the pin voltage

is at the V_{det(H)(PROTECT)}level.

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

6 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

The PROTECT input can be used to create overvoltage detection and OTP functions.

A small 10 nF capacitor can be connected to the pin if the protections on this pin are not

used.

An internal clamp of 4.1 V (typical) protects this pin from excessive voltages.

7.6 Duty cycle control (CTRL pin)

The output power of the converter is regulated by the CTRL pin. This pin is connected to

an internal 5.4 V supply using an internal 7 kΩ resistor.

The CTRL pin voltage sets the peak current which is measured using the ISENSE pin

(see Section 7.10). At a low output power, the switching frequency is also reduced (see

Section 7.12). The maximum duty cycle is limited to 72 %.

7.7 Slope compensation (CTRL pin)

A slope compensation circuit is integrated in the IC or CCM. Slope compensation

guarantees stable operation for duty cycles greater than 50 %.

7.8 Overpower timer (OPTIMER pin)

If the OPTIMER pin is connected to capacitor C4 (see Figure 3), a temporary overload

situation is allowed. V_ctrl(Ipeak)(see Figure 1) is set by the CTRL. When V_ctrl(Ipeak)is above

400 mV, the I_IO(OPTIMER)current (11 μA typical) is sourced from the OPTIMER pin. If the

voltage on the OPTIMER pin reaches the V_{prot(OPTIMER)}voltage (2.5 V typical) the

OverPower Protection (OPP) is triggered (see Figure 5).

I

O

V

O

400 mV

V

ISENSE

V

prot(OPTIMER)

V

OPTIMER

normal

load

high load

protection

014aaa930

Fig 5. Overpower delay (TEA1733T)

• TEA1733T: when the V_{prot(OPTIMER)}voltage is reached the device restarted

• TEA1733LT: when the V_{prot(OPTIMER)}voltage is reached, it is latched in the off state

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

7 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

I

O

V

O

400 mV

V

ISENSE

V

prot(OPTIMER)

V

OPTIMER

normal

load

high load

protection

014aaa968

Fig 6. Overpower delay: latched (TEA1733LT)

7.9 Current mode control (ISENSE pin)

Current mode control is used for its good line regulation.

The primary current is sensed by the ISENSE pin across an external resistor R9

(see Figure 3) and compared with an internal reference voltage. The internal reference

voltage is proportional to the CTRL pin voltage (see Figure 7).

014aaa931

0.6

V

sense(max)

(V)

0.4

frequency

reduction

0.2

0

1

2

3

4

V

(V)

CTRL

Fig 7. Peak current control using pin ISENSE

Leading edge blanking prevents false triggering due to capacitive discharge when

switching on the external power switch (see Figure 8).

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

8 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

t

leb

V

sense(max)

VISENSE

t

014aaa932

Fig 8. Leading edge blanking

7.10 Overpower or high/low line compensation (VINSENSE and

ISENSE pins)

The overpower compensation function can be used to realize a maximum output power

which is nearly constant over the full input mains.

The overpower compensation circuit measures the input voltage on the VINSENSE pin

and outputs a proportionally dependent current on the ISENSE pin. The DC voltage

across the soft start resistor limits the maximum peak current on the current sense

resistor.

At low output power levels, the overpower compensation circuit is switched off

(See Figure 9).

2

1.7

I

ISENSE

(μA)

0.68

1

2

3

4

V

(V)

VINSENSE

014aaa933

Fig 9. Overpower compensation using pins VINSENSE and ISENSE

7.11 Soft start-up (ISENSE pin)

A soft start is made to prevent audible noise during start-up or a restart condition. Before

the converter starts, the soft start capacitor C6 (see Figure 3) on the ISENSE pin is

charged. When the converter starts switching, the primary peak current slowly increases

as the soft start capacitor discharges through the soft start resistor (R6, see Figure 3).

The soft start time constant is set by the soft start capacitor value chosen. The soft start

resistor value must also be taken into account, but this value is typically defined by the

overpower compensation (see Section 7.10).

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

9 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

7.12 Low power operation

In low power operation switching losses are reduced by lowering the switching frequency.

The converter switching frequency is reduced and the peak current is set to 25 % of the

maximum peak current (see Figure 7 and Figure 10).

f

sw

(kHz)

switching

frequency

1

2

V

(V)

CTRL

014aaa934

Fig 10. Frequency control

7.13 Driver (pin DRIVER)

The driver circuit to the gate of the power MOSFET has a current sourcing capability of

typically −250 mA and a current sink capability of typically 750 mA. This allows for a fast

turn-on and turn-off of the power MOSFET for efficient operation.

7.14 OverTemperature Protection (OTP)

Integrated overtemperature protection ensures the IC stops switching if the junction

temperature exceeds the thermal temperature shutdown limit.

OTP is a latched protection and it can be reset by removing the voltage on pin VCC.

8. Limiting values

Table 3.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Voltages

V_CC

Parameter

Conditions

Min

Max

Unit

supply voltage

continuous

−0.4

-

+30

35

V

t < 100 ms

V_VINSENSE

V_PROTECT

V_CTRL

voltage on pin VINSENSE

voltage on pin PROTECT

voltage on pin CTRL

current limited

−0.4

+5.5

+5

V_IO(OPTIMER)

input/output voltage on pin

OPTIMER

+5

V_ISENSE

voltage on pin ISENSE

current limited

−0.4

+5

V

Currents

I_I(VINSENSE)

I_I(PROTECT)

input current on pin VINSENSE

input current on pin PROTECT

−1

+1

mA

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

10 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

Table 3.

Limiting values …continued

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

I_CTRL

I_ISENSE

I_DRIVER

General

P_tot

Parameter

Conditions

Min

−3

Max

0

Unit

mA

A

current on pin CTRL

current on pin ISENSE

current on pin DRIVER

−10

−0.4

+1

δ < 10 %

total power dissipation

storage temperature

junction temperature

T_amb< 75 °C

-

0.5

W

T_stg

−55

−40

+150

°C

T_j

ESD

V_ESD

electrostatic discharge voltage

class 1

[1]

[2]

human body model

machine model

charged device model

-

4000

300

V

750

[1] Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.

[2] Equivalent to discharging a 200 pF capacitor through a 0.75 μH coil and a 10 Ω resistor.

9. Thermal characteristics

Table 4.

Symbol

R_th(j-a)

Thermal characteristics

Parameter

Conditions

Typ

Unit

thermal resistance from

in free air; JEDEC test board

150

K/W

junction to ambient

R_th(j-c)

thermal resistance from

junction to case

in free air; JEDEC test board

79

K/W

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

11 of 20

TEA1733T; TEA1733LT

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GreenChip III SMPS control IC

10. Characteristics

Table 5.

_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.

Characteristics

T

Symbol Parameter

Supply voltage management (pin VCC)

Conditions

Min

Typ

Max

Unit

V_startup

start-up voltage

18.6

11.2

20.6

12.2

22.6

13.2

V

V_th(UVLO)

undervoltage lockout

threshold voltage

V_clamp(VCC)

clamp voltage on pin

VCC

activated during restart

-

V_startup+ 1

-

V

activated during latched

protection

V_rst(latch)+ 1 -

V_hys

hysteresis voltage

V_startup− V_th(UVLO)

8

9

10

V

I_CC(startup)

I_CC(oper)

V_rst(latch)

start-up supply current

V_CC< V_startup

5

10

0.5

5

15

0.6

6

μA

mA

V

operating supply current no load on pin DRIVER

latched reset voltage

0.4

4

Input voltage sensing (pin VINSENSE)

V_{start(VINSENSE)}

start voltage on pin

VINSENSE

detection level

0.89

0.68

0.94

0.72

0.99

0.76

V

V_{det(L)(VINSENSE)}

LOW-level detection

voltage on pin

VINSENSE

V_{det(H)(VINSENSE)}

HIGH-level detection

voltage on pin

VINSENSE

3.39

3.52

3.65

V

I_O(VINSENSE)

output current on pin

VINSENSE

-

−20

-

nA

V

V_{clamp(VINSENSE)}

clamp voltage on pin

VINSENSE

I_I(VINSENSE)= 50 μA

5.2

Protection input (pin PROTECT)

V_{det(L)(PROTECT)}LOW-level detection

0.47

0.75

0.50

0.8

0.53

0.85

V

voltage on pin

PROTECT

V_{det(H)(PROTECT)}

HIGH-level detection

voltage on pin

PROTECT

I_O(PROTECT)

output current on pin

PROTECT

V_VINSENSE= V_low(PROTECT)

V_VINSENSE= V_{high(PROTECT)}

I_I(PROTECT)= 200 μA

−34

87

−32

107

4.1

−30

127

4.7

μA

V

[1]

V_{clamp(PROTECT)}

clamp voltage on pin

PROTECT

3.5

Peak current control (pin CTRL)

V_CTRL

voltage on pin CTRL

for minimum flyback peak

current

1.5

3.4

5

1.8

3.9

7

2.1

4.3

9

V

for maximum flyback peak

current

V

R_int(CTRL)

internal resistance on

pin CTRL

kΩ

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

12 of 20

TEA1733T; TEA1733LT

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GreenChip III SMPS control IC

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

−0.5

−0.2

Max

−0.3

−0.12

Unit

mA

I_O(CTRL)

output current on pin

CTRL

V_CTRL= 1.4 V

V_CTRL= 3.7 V

−0.7

−0.28

Pulse width modulator

f_osc

oscillator frequency

62

66.5

280

± 4

71

kHz

Hz

f_mod

Δf_mod

modulation frequency

210

± 3

350

± 5

modulation frequency

variation

kHz

δ_max

maximum duty cycle

68.5

1.5

72

79

%

V_start(red)f

frequency reduction start pin CTRL

voltage

1.8

2.1

V

V_δ(zero)

zero duty cycle voltage pin CTRL

1.25

2.4

1.55

2.5

1.85

2.6

V

Overpower protection (pin OPTIMER)

V_{prot(OPTIMER)}

protection voltage on pin

OPTIMER

I_{prot(OPTIMER)}

protection current on pin no overpower situation

100

150

200

μA

OPTIMER

overpower situation

−12.2

−10.7

−9.2

Restart timer (pin OPTIMER)

V_{restart(OPTIMER)}restart voltage on pin

low level

0.8

1.2

1.6

4.9

−87

V

OPTIMER

high level

4.1

4.5

V

I_{restart(OPTIMER)}

restart current on pin

OPTIMER

charging OPTIMER

capacitor

−127

−107

μA

discharging OPTIMER

capacitor

−0.1

0

0.1

μA

Current sense (pin ISENSE)

V_sense(max)

maximum sense voltage ΔV/Δt = 50 mV/μs;

0.48

0.50

370

17

0.51

0.53

400

25

0.54

0.56

430

33

V

V_VINSENSE= 0.78 V

ΔV/Δt = 200 mV/μs;

V_VINSENSE= 0.78 V

V

V_th(sense)opp

ΔV_ISENSE/Δt

t_leb

overpower protection

sense threshold voltage

mV

mV/μs

ns

slope compensation

ΔV/Δt = 50 mV/μs

voltage on pin ISENSE

leading edge blanking

time

250

300

350

Overpower compensation (pin VINSENSE and pin ISENSE)

I_opc(ISENSE)overpower _VINSENSE= 1 V;

V

-

0.28

1.7

-

μA

compensation current on V_sense(max)> 400 mV

pin ISENSE

V_VINSENSE=3 V;

V_sense(max)> 400 mV

Soft start (pin ISENSE)

I_start(soft)

soft start current

soft start voltage

−63

−55

−47

μA

V_start(soft)

V_CTRL= 4 V; enable

voltage

-

V_sense(max)

-

V

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

13 of 20

TEA1733T; TEA1733LT

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GreenChip III SMPS control IC

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

R_start(soft)

soft start resistance

12

-

kΩ

Driver (pin DRIVER)

I_{source(DRIVER)}source current on pin

V_DRIVER= 2 V

-

−0.3

−0.25

A

DRIVER

I_sink(DRIVER)

sink current on pin

DRIVER

V_DRIVER= 2 V

V_DRIVER= 10 V

0.25

0.6

9

0.3

-

A

V

0.75

10.5

-

V_O(DRIVER)max

maximum output voltage

on pin DRIVER

12

Temperature protection

T_pl(IC)IC protection level

temperature

130

140

150

°C

[1] The clamp voltage on the PROTECT pin is lowered when the IC is in power-down (latched or restart protection).

11. Application information

A power supply with the TEA1733(L) is a flyback converter operating in Continuous

conduction mode (See Figure 11).

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 Figure 11, the PROTECT pin is used for OVP and OTP. The OVP

level is set by diode Z1 to V_CC= 25.8 V. The OTP level is set by Negative 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.

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

14 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

C1

68 μF

R1

10 MΩ

C2

100 nF

R2

82 kΩ

TEA1733T

R5

VINSENSE

PROTECT

ISENSE

5

6

7

8

4

3

2

1

S1

470 Ω

R10

DRIVER

GND

R3

1 MΩ

10 Ω

R4

200 kΩ

CTRL

R6

Θ

OPTIMER

22 kΩ

C6

VCC

Z1

25 V

C3

1 nF

R8

2.2 MΩ

C4

220 nF

C5

4.7 μF

220 nF

R9

0.25 Ω

R7

10 Ω

014aaa935

Fig 11. Typical application

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

15 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

12. Package outline

SO8: plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

D

E

A

X

v

c

y

H

M

A

E

Z

5

8

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

1

4

e

w

M

detail X

b

p

0

2.5

5 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

(1)

(2)

UNIT

A

b

c

D

E

e

H

L

p

Q

v

w

y

Z

θ

1

2

3

p

E

max.

0.25

0.10

1.45

1.25

0.49

0.36

0.25

0.19

5.0

4.8

4.0

3.8

6.2

5.8

1.0

0.4

0.7

0.6

0.7

0.3

mm

1.27

0.05

1.05

0.041

1.75

0.25

0.01

0.25

0.01

0.25

0.1

8^o

0^o

0.010 0.057

0.004 0.049

0.019 0.0100 0.20

0.014 0.0075 0.19

0.16

0.15

0.244

0.228

0.039 0.028

0.016 0.024

0.028

0.012

inches 0.069

0.01 0.004

Notes

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-18

SOT96-1

076E03

MS-012

Fig 12. Package outline SOT96-1 (SO8)

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

16 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

13. Revision history

Table 6.

Revision history

Document ID

Release date Data sheet status

20100326 Product data sheet

Change notice Supersedes

TEA1733T_TEA1733LT_2

Modifications:

-

TEA1733T_TEA1733LT_1

• Typical value of V_{start(VINSENSE)}changed in Section 7.4 “Input voltage detection

(VINSENSE pin)”.

• Value of internal voltage source changed in Section 7.6 “Duty cycle control (CTRL pin)”.

• Value of I_IO(OPTIMER)changed in Section 7.8 “Overpower timer (OPTIMER pin)”.

• Figure 6 “Overpower delay: latched (TEA1733LT)” added.

• Pin number changed in Table 5 “Characteristics”.

• Figure 11 “Typical application” changed.

• Package information in figure title of Figure 12 “Package outline SOT96-1 (SO8)”

changed.

TEA1733T_TEA1733LT_1

20091026

Objective data sheet

-

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

17 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

14. Legal information

14.1 Data sheet status

Document status^[1][2]

Product status^[3]

Development

Definition

Objective [short] data sheet

This document contains data from the objective specification for product development.

This document contains data from the preliminary specification.

This document contains the product specification.

Preliminary [short] data sheet Qualification

Product [short] data sheet Production

[1]

[2]

[3]

Please consult the most recently issued document before initiating or completing a design.

The term ‘short data sheet’ is explained in section “Definitions”.

The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

malfunction of an NXP Semiconductors product can reasonably be expected

14.2 Definitions

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences of

use of such information.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

specified use without further testing or modification.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended

for quick reference only and should not be relied upon to contain detailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semiconductors sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall prevail.

NXP Semiconductors does not accept any liability related to any default,

damage, costs or problem which is based on a weakness or default in the

customer application/use or the application/use of customer’s third party

customer(s) (hereinafter both referred to as “Application”). It is customer’s

sole responsibility to check whether the NXP Semiconductors product is

suitable and fit for the Application planned. Customer has to do all necessary

testing for the Application in order to avoid a default of the Application and the

product. NXP Semiconductors does not accept any liability in this respect.

Product specification — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

NXP Semiconductors and its customer, unless NXP Semiconductors and

customer have explicitly agreed otherwise in writing. In no event however,

shall an agreement be valid in which the NXP Semiconductors product is

deemed to offer functions and qualities beyond those described in the

Product data sheet.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those given in

the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

14.3 Disclaimers

Terms and conditions of commercial sale — NXP Semiconductors

products are sold subject to the general terms and conditions of commercial

sale, as published at http://www.nxp.com/profile/terms, unless otherwise

agreed in a valid written individual agreement. In case an individual

agreement is concluded only the terms and conditions of the respective

agreement shall apply. NXP Semiconductors hereby expressly objects to

applying the customer’s general terms and conditions with regard to the

purchase of NXP Semiconductors products by customer.

Limited warranty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warranties, expressed or implied, as to the accuracy or

completeness of such information and shall have no liability for the

consequences of use of such information.

In no event shall NXP Semiconductors be liable for any indirect, incidental,

punitive, special or consequential damages (including - without limitation - lost

profits, lost savings, business interruption, costs related to the removal or

replacement of any products or rework charges) whether or not such

damages are based on tort (including negligence), warranty, breach of

contract or any other legal theory.

No offer to sell or license — Nothing in this document may be interpreted or

construed as an offer to sell products that is open for acceptance or the grant,

conveyance or implication of any license under any copyrights, patents or

other industrial or intellectual property rights.

Notwithstanding any damages that customer might incur for any reason

whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards

customer for the products described herein shall be limited in accordance

with the Terms and conditions of commercial sale of NXP Semiconductors.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from national authorities.

Non-automotive qualified products — Unless this data sheet expressly

states that this specific NXP Semiconductors product is automotive qualified,

the product is not suitable for automotive use. It is neither qualified nor tested

in accordance with automotive testing or application requirements. NXP

Semiconductors accepts no liability for inclusion and/or use of

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation specifications and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

non-automotive qualified products in automotive equipment or applications.

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in medical, military, aircraft,

space or life support equipment, nor in applications where failure or

In the event that customer uses the product for design-in and use in

automotive applications to automotive specifications and standards, customer

(a) shall use the product without NXP Semiconductors’ warranty of the

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

18 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

product for such automotive applications, use and specifications, and (b)

whenever customer uses the product for automotive applications beyond

NXP Semiconductors’ specifications such use shall be solely at customer’s

own risk, and (c) customer fully indemnifies NXP Semiconductors for any

liability, damages or failed product claims resulting from customer design and

use of the product for automotive applications beyond NXP Semiconductors’

standard warranty and NXP Semiconductors’ product specifications.

14.4 Trademarks

Notice: All referenced brands, product names, service names and trademarks

are the property of their respective owners.

GreenChip — is a trademark of NXP B.V.

15. Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

TEA1733T_TEA1733LT_2

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Product data sheet

Rev. 02 — 26 March 2010

19 of 20

TEA1733T; TEA1733LT

NXP Semiconductors

GreenChip III SMPS control IC

16. Contents

1

General description. . . . . . . . . . . . . . . . . . . . . . 1

2

2.1

3

Features and benefits . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ordering information. . . . . . . . . . . . . . . . . . . . . 2

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4

5

6

6.1

6.2

Pinning information. . . . . . . . . . . . . . . . . . . . . . 4

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4

7

Functional description . . . . . . . . . . . . . . . . . . . 5

General control. . . . . . . . . . . . . . . . . . . . . . . . . 5

Start-up and UnderVoltage LockOut (UVLO) . . 5

Supply management. . . . . . . . . . . . . . . . . . . . . 6

Input voltage detection (VINSENSE pin) . . . . . 6

Protection input (PROTECT PIN). . . . . . . . . . . 6

Duty cycle control (CTRL pin). . . . . . . . . . . . . . 7

Slope compensation (CTRL pin). . . . . . . . . . . . 7

Overpower timer (OPTIMER pin) . . . . . . . . . . . 7

Current mode control (ISENSE pin) . . . . . . . . . 8

Overpower or high/low line compensation

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

(VINSENSE and ISENSE pins) . . . . . . . . . . . . 9

Soft start-up (ISENSE pin) . . . . . . . . . . . . . . . . 9

Low power operation . . . . . . . . . . . . . . . . . . . 10

Driver (pin DRIVER) . . . . . . . . . . . . . . . . . . . . 10

OverTemperature Protection (OTP) . . . . . . . . 10

7.11

7.12

7.13

7.14

8

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 10

Thermal characteristics . . . . . . . . . . . . . . . . . 11

Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . 12

Application information. . . . . . . . . . . . . . . . . . 14

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16

Revision history. . . . . . . . . . . . . . . . . . . . . . . . 17

9

10

11

12

13

14

Legal information. . . . . . . . . . . . . . . . . . . . . . . 18

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 18

Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 19

14.1

14.2

14.3

14.4

15

16

Contact information. . . . . . . . . . . . . . . . . . . . . 19

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 26 March 2010

Document identifier: TEA1733T_TEA1733LT_2


型号：	TEA1733T_10
厂家：	NXP
描述：	GreenChip III SMPS control IC 的GreenChip III开关电源控制IC 开关
文件：	总20页 (文件大小：176K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TEA1733T_10 [NXP]

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