HA16121FPJ PDF даташит
Спецификация HA16121FPJ изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «Switching Regulator for Chopper Type DC/DC Converter». |
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Детали детали
Номер произв | HA16121FPJ |
Описание | Switching Regulator for Chopper Type DC/DC Converter |
Производители | Hitachi Semiconductor |
логотип |
30 Pages
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HA16116FP/FPJ, HA16121FP/FPJ
Switching Regulator for Chopper Type DC/DC Converter
Description
HA16116FP/FPJ and HA16121FP/FPJ are dual-channel PWM switching regulator controller ICs for use in
chopper-type DC/DC converters.
This IC series incorporates totem pole gate drive circuits to allow direct driving of a power MOS FET. The
output logic is preset for booster, step-down, or inverting control in a DC/DC converter. This logic
assumes use of an N-channel power MOS FET for booster control, and a P-channel power MOS FET for
step-down or inverting control.
HA16116 includes a built-in logic circuit for step-down control only, and one for use in both step-down
and inverting control. HA16121 has a logic circuit for booster control only and one for both step-down and
inverting control.
Both ICs have a pulse-by-pulse current limiter, which limits PWM pulse width per pulse as a means of
protecting against overcurrent, and which uses an on/off timer for intermittent operation. Unlike
conventional methods that use a latch timer for shutdown, when the pulse-by-pulse current limiter
continues operation beyond the time set in the timer, the IC is made to operate intermittently (flickering
operation), resulting in sharp vertical setting characteristics. When the overcurrent condition subsides, the
output is automatically restored to normal.
The dual control circuits in the IC output identical triangle waveforms, for completely synchronous
configuring a compact, high efficiency dual-channel DC/DC converter, with fewer external components
than were necessary previously.
Functions
• 2.5 V reference voltage (Vref) regulator
• Triangle wave form oscillator
• Dual overcurrent detector
• Dual totem pole output driver
• UVL (under voltage lock out) system
• Dual error amplifier
• Vref overvoltage detector
• Dual PWM comparator
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HA16116FP/FPJ, HA16121FP/FPJ
Features
• Wide operating supply voltage range* (3.9 V to 40.0 V)
• Wide operating frequency range (600 kHz maximum operation)
• Direct power MOS FET driving (output current ±1 A peak in maximum rating)
• Pulse-by-pulse overcurrent protection circuit with intermittent operation function (When overcurrent
state continues beyond time set in timer, the IC operates intermittently to prevent excessive output
current.)
• Grounding the ON/OFF pin turns the IC off, saving power dissipation. (HA16116: IOFF = 10 µA max.;
HA16121: IOFF = 150 µA max.)
• Built-in UVL circuit (UVL voltage can be varied with external resistance.)
• Built-in soft start and quick shutoff functions
Note: The reference voltage 2.5 V is under the condition of VIN ≥ 4.5 V.
Ordering Information
Hitachi Control ICs for Chopper-Type DC/DC Converters
Channels
Dual
Single
Dual
Product
Number
HA17451
HA16114
HA16120
HA16116
HA16121
Channel Control Functions
No. Step-Up Step-Down
Ch 1
r
r
Ch 2
r
r
——
r
—r
—
Ch 1
—
r
Ch 2
—
r
Ch 1
—
r
Ch 2
r
—
Inverting
r
r
r
—
r
—
r
—
Output Circuits
Open collector
Totem pole
power MOS FET
driver
Overcurrent
Protection
SCP with timer (latch)
Pulse-by-pulse
current limiter and
intermittent operation
by on/off timer
2
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Pin Arrangement
HA16116FP/FPJ, HA16121FP/FPJ
S.GND *1
CT
RT
IN(+)1
IN(−)1
E/O1
Channel 1
DB1
CL1
OUT1
P.GND *1
1
2
3
4
5
6
7
8
9
10
20 S.VIN*2
19 Vref
18 TIM
17 ON/OFF
16 IN(−)2
15 E/O2
Channel 2
14 DB2
13 CL2
12 OUT2
11
P.V
*2
IN
(top view)
Notes: 1. Pins S.GND (pin 1) and P.GND (pin 10) have no direct internal interconnection.
Both pins must be connected to ground.
2. Pins S.VIN (pin 20) and P.VIN (pin 11) have no direct internal interconnection.
Both pins must be connected to VIN.
3
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Номер в каталоге | Описание | Производители |
HA16121FP | Switching Regulator for Chopper Type DC/DC Converter | Hitachi Semiconductor |
HA16121FPJ | Switching Regulator for Chopper Type DC/DC Converter | Hitachi Semiconductor |
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DataSheet26.com | 2020 | Контакты | Поиск |