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參數(shù)資料
| 型號： | UCC3806L |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.5 A SWITCHING CONTROLLER, CQCC20 |
| 封裝： | LCC-20 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 118K |
| 代理商： | UCC3806L |
4
UCC1806
UCC2806
UCC3806
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, these specifications hold for T
A
= –55°C to +125°C for the
UCC1806,
40°C to +85°C for the UCC2806, and 0°C to +70°C for the UCC3806; V
IN
= 12V, R
T
= 33k, C
T
= 330pF,
C
BYPASS
on V
REF
= 0.01
μ
F, T
A
= T
J
.
PARAMETER
TEST CONDITION
UCC1806 / UCC2806
MIN
TYP
UCC3806
TYP
UNITS
MAX
MIN
MAX
Output Section
Output Supply Voltage
Output Low Level
2.5
15
300
1.1
2.5
15
200
1.1
V
I
SINK
= 20mA
I
SINK
= 100mA
I
SOURCE
=
20mA
I
SOURCE
=
100mA
T
J
= 25
°
C, C
LOAD
= 1000pF
T
J
= 25
°
C, C
LOAD
= 1000pF
100
0.40
11.9
11.6
35
35
100
0.40
11.9
11.6
35
35
mV
V
V
V
ns
ns
Output High Level
11.6
11
11.6
11
Rise Time
Fall Time
Under Voltage Lockout Section
Startup Current
Operating Supply Current
V
IN
Shunt Voltage
Startup Threshold
Threshold Hysteresis
65
65
65
65
V
IN
< Start Threshold
50
1
100
1.4
17.5
8
50
1
100
1.4
17.5
8
μ
A
mA
V
V
V
I
VIN
= 10mA
15
6.5
15
6.5
7.5
0.75
7.5
0.75
Note 1: All voltages are with respect to Ground, Pin 12.
Note 2: Currents are positive into, negative out of the specified terminal.
Note 3: Parameters measured at trip point of latch with V
PIN 5
= V
REF
, V
PIN 6
= 0V
Note 4: Amplifier gain defined as: G = delta change at Pin 7/delta change forced at Pin 4 delta voltage at Pin 4 = 0 to 1V
Note 5: Guaranteed by design. Not 100% tested in production.
Note 6: Current Sense Amp output is slew rate limited to provide noise immunity.
Note 7: Line Range = 10V to 15V Load Range = 0.2mA to 5mA.
PIN DESCRIPTIONS
AOUT and BOUT:
AOUT and BOUT provide alternating
high current gate drive for the external MOSFETs. Duty
cycle can be varied from 0 to 50% where minimum dead
time is a function of CT. Both outputs use MOS transistor
switches with inherent anti-parallel body diodes to clamp
voltage swings to the supply rails, allowing operation
without the use of clamp diodes.
COMP:
COMP is the output of the error amplifier and the
input of the PWM comparator. The error amplifier is a low
output impedance, 2MHz operational amplifier which al-
lows sinking or sourcing of current at the COMP pin. The
error amplifier is internally current limited, so that zero
duty cycle can be commanded by externally forcing
COMP to GND.
CS–:
CS- is the inverting input of the 3X, differential cur-
rent sense amplifier.
CS+:
CS+ is the non-inverting input of the 3X, differential
current sense amplifier.
CT:
CT is the oscillator timing capacitor connection point,
which is charged by the current set by RT. CT is dis-
charged to GND through a 2.6mA current sink. This
causes a linear discharge of CT to zero volts which then
initiates the next switching cycle. Dead time occurs dur-
ing the discharge of CT, forcing AOUT and BOUT low.
Switching frequency (fs) and dead time (td) are approxi-
mated by:
1
2
fs
RT CT
tdandtd
CT
=
+
=
961
CURLIM:
CURLIM programs the primary current limit
threshold and determines whether the device will latch
off or retry after an overcurrent condition. When a shut-
down signal is generated, a 200
μ
A current source to
ground pulls down on CURLIM. If the voltage on the pin
remains above 350mV the device remains latched and
the power must be cycled to restart. If the voltage on the
pin falls below 350mV, the device attempts a restart. The
voltage threshold is typically set by a resistor divider from
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| UCC3806N | 功能描述:電流型 PWM 控制器 Low Power Dual Out Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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| UCC3806NG4 | 功能描述:電流型 PWM 控制器 Low Power Dual Out Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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